Given below are a few statements with reference to the accessory ducts of the human male reproductive system :

Question

Q. Given below are a few statements with reference to the accessory ducts of the human male reproductive system :

(i) The seminiferous tubules of the testes open into rete testis then into the vas deferens.

(ii) The vasa efferentia leave the testes and open into the epididymis.

(iii) The epididymis leads to vas deferens that ascends into the abdomen.

(iv) The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct.

(v) The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus. Choose the option with all true statements from the given options : (A) (i), (ii),

(iv) (B) (ii), (iii),

(v) (C) (ii), (iv),

(v) (D) (i), (iii), (iv)

CBSECBSE Class XII Board 2025MCQ· 1mImportance★★★★★

✓ Free question

Concept understanding — Male Reproductive Anatomy

Male Reproductive Anatomy – A First Look

Think of the male reproductive system as a production and delivery line. Its job is to make tiny cells called sperm (the male contribution to reproduction) and then safely deliver them into the female body. Unlike the female system, which is mostly internal, the male system has several parts that are visible outside the body. That’s the first big clue: the system is built for external production and internal delivery.

The Two Main Jobs

The male reproductive system does two things at once:

Spermatogenesis – making sperm inside the testes.
Hormone production – making the male sex hormone testosterone, which drives puberty, muscle growth, voice deepening, and sex drive.

These two jobs happen in the same organs, but they are separate processes. Testosterone is made by special cells between the sperm-making tubes, not inside the tubes themselves.

The Key Parts (from outside to inside)

1. The Testes (the factories)

The two testes (singular: testis) are oval organs about the size of a large olive. They hang outside the body in a pouch of skin called the scrotum. Why outside? Because sperm production needs a temperature about 2–3°C lower than normal body temperature. The scrotum can contract (pull testes closer to the body when cold) or relax (let them hang lower when warm) to regulate this temperature.

Inside each testis are about 250–300 coiled tubes called seminiferous tubules. This is where sperm are actually made. Between these tubules are the interstitial cells (Leydig cells) that produce testosterone.

Note

The testes are the primary male reproductive organs – they produce both the gametes (sperm) and the hormone (testosterone). Everything else in the system is a duct, gland, or delivery tube.

2. The Duct System (the conveyor belt)

Once sperm are made, they need to travel. The path is:

Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra

The epididymis is a long, coiled tube stuck to the back of each testis. Sperm are stored here and become motile (able to swim) as they pass through. It takes about 2–3 weeks for a sperm to travel the full length of the epididymis.

The vas deferens (plural: vasa deferentia) is a thick-walled muscular tube that runs from the scrotum up into the abdomen. You can feel it as a firm cord just above the testis – it’s part of the spermatic cord. During a vasectomy, this tube is cut or blocked to prevent sperm from reaching the urethra.

3. The Accessory Glands (the fluids)

Sperm alone are just a tiny fraction of the fluid that comes out during ejaculation. Most of the volume comes from three sets of glands:

Seminal vesicles – two sac-like structures behind the bladder. They secrete a thick, fructose-rich fluid that provides energy for the sperm. This makes up about 60–70% of the semen volume.
Prostate gland – a walnut-sized gland that surrounds the urethra just below the bladder. It secretes a thin, milky fluid that makes the semen more fluid and slightly alkaline (to protect sperm from the acidic vagina).
Bulbourethral glands (Cowper’s glands) – two pea-sized glands near the base of the penis. They secrete a clear, slippery fluid before ejaculation that lubricates the urethra and neutralises any leftover urine acidity.

Important

Semen is not just sperm. It is a mixture of sperm (about 1–5% of the volume) plus secretions from the seminal vesicles, prostate, and bulbourethral glands. The sperm themselves are made in the testes; everything else is added along the way.

4. The Penis (the delivery tube)

The penis is the external organ that deposits semen into the female vagina. It contains three columns of erectile tissue that fill with blood during arousal, causing an erection. The urethra runs through the centre of the penis and carries both urine and semen – but never at the same time. A sphincter (a ring of muscle) at the base of the bladder closes off the urine passage during ejaculation.

The tip of the penis is called the glans penis, which is covered by a loose fold of skin called the foreskin (prepuce) in uncircumcised males.

Why This Matters (beyond reproduction)

The male reproductive system is not just about making babies. Testosterone affects:

Bone density and muscle mass
Red blood cell production
Hair growth and voice deepening
Libido (sex drive)

Problems in this system can show up as infertility, erectile dysfunction, or hormonal imbalances. Understanding the anatomy helps you see where a problem might be – for example, a blockage in the vas deferens would stop sperm from reaching the semen, but testosterone production would remain normal.

A Quick Summary Table

Part	Function	Key Fact
Testes	Make sperm and testosterone	Located outside body for temperature control
Epididymis	Stores and matures sperm	Sperm become motile here
Vas deferens	Transports sperm	Cut during vasectomy
Seminal vesicles	Add fructose-rich fluid	60–70% of semen volume
Prostate gland	Adds alkaline fluid	Makes semen fluid
Bulbourethral glands	Lubricate urethra	Secreted before ejaculation
Penis	Deposits semen	Contains erectile tissue

Note

The NCERT textbook (Class 12 Biology, Chapter 3) covers this exactly as described above. The key terms to remember for exams are: seminiferous tubules, Leydig cells, epididymis, vas deferens, seminal vesicle, prostate, and bulbourethral gland. Know the path of sperm from production to delivery – that’s a common question.

This concept is a common exam-prep search query, appearing online as "Male Reproductive Anatomy NEET questions", "NCERT biology syllabus male reproductive anatomy", or "Male Reproductive Anatomy notes class 12 biology". This concept is directly part of the Human Reproduction chapter in the NCERT/CBSE Class 12 Biology syllabus, and it is also an important topic for NEET and state medical/CET entrance exams, making it worth mastering for both board and competitive-exam preparation.

This question tests knowledge of the correct sequence and connections of the accessory ducts in the human male reproductive system. Statements (ii), (iii), and (v) accurately describe these ducts, making option (B) the correct choice.

Concept and Intuition

The male reproductive system includes a network of accessory ducts that play a crucial role in the transport, storage, and maturation of sperm. Understanding the precise pathway sperm take from their production site in the testes to their exit from the body is key. This pathway involves a series of interconnected tubes, each with a specific function and anatomical location. Any deviation from this correct sequence or connection makes a statement false.

Evaluate Statement (i): "The seminiferous tubules of the testes open into rete testis then into the vas deferens."
- Sperm are produced in the seminiferous tubules within the testes. From there, they move into the rete testis, a network of tubules. This part of the statement is correct.
- However, from the rete testis, sperm do not directly enter the vas deferens. Instead, they pass through several small ducts called the vasa efferentia, which then lead into the epididymis. Only after passing through the epididymis does the duct continue as the vas deferens.
- Therefore, this statement is false because it omits the vasa efferentia and epididymis in the sequence.
Evaluate Statement (ii): "The vasa efferentia leave the testes and open into the epididymis."
- Following the rete testis, the vasa efferentia (also called efferent ductules) are indeed the ducts that emerge from the testes and transport sperm to the epididymis. The epididymis is a highly coiled tube located on the posterior surface of each testis, where sperm mature and are stored.
- This statement accurately describes the anatomical connection.
- Therefore, this statement is true.
Evaluate Statement (iii): "The epididymis leads to vas deferens that ascends into the abdomen."
- The tail of the epididymis is continuous with the vas deferens (also known as the ductus deferens). The vas deferens is a muscular tube that ascends from the scrotum into the abdominal cavity, looping over the urinary bladder. It is a major component of the spermatic cord.
- This statement correctly describes the continuation of the epididymis and the path of the vas deferens.
- Therefore, this statement is true.
Evaluate Statement (iv): "The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct."
- The vas deferens does not receive a duct from the prostate gland. Instead, each vas deferens joins with the duct of a seminal vesicle to form an ejaculatory duct. The seminal vesicles are a pair of glands that secrete a fluid rich in fructose and prostaglandins.
- The prostate gland, a single gland located below the urinary bladder, secretes its fluid directly into the urethra, not into the vas deferens or ejaculatory duct in this manner.
- Therefore, this statement is false due to the incorrect gland mentioned.
Evaluate Statement (v): "The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus."
- In males, the urethra serves as a common pathway for both urine and semen. It originates from the urinary bladder, passes through the prostate gland, then through the penis, and finally opens to the outside at the urethral meatus (external urethral orifice).
- This statement accurately describes the origin and path of the male urethra.
- Therefore, this statement is true.

Based on the evaluation, the true statements are (ii), (iii), and (v). We now check the given options to find the one that includes all these true statements.

(A) (i), (ii), (iv) - Incorrect (i and iv are false)

(B) (ii), (iii), (v) - Correct

(D) (i), (iii), (iv) - Incorrect (i and iv are false)

✓Final answer

The option with all true statements is (B) .

Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

Showing the 12 most recent of 39 on this concept.

CBSE 2026Set V11 markMCQ
$Q. The cells that secrete androgens are$
(a) Sertoli cells
(b) Leydig cells
(c) Germ cells
(d) Spermatogonia
›Reveal solutionSolution

The interstitial Leydig cells of the testis secrete androgens.

In the testis, the Leydig cells (interstitial cells) lie in the spaces between the seminiferous tubules and synthesise and secrete the male sex hormones called androgens (mainly testosterone). Sertoli cells nourish the developing germ cells, germ cells/spermatogonia give rise to sperm — they do not secrete androgens.

✓Final answer
$(b) Leydig cells$
CBSE 2026Set A1 markMCQ
$Q. Which of the following cells are found in seminiferous tubules?$
(a) Sertoli cells
(b) Interstitial cells
(c) Spermatogonia
(d) Both (A) and (C)
›Reveal solutionSolution

Inside the seminiferous tubules are spermatogonia (germ cells) and Sertoli (nurse) cells; interstitial (Leydig) cells lie outside the tubules.

The lining of each seminiferous tubule is made of two types of cells: the male germ cells or spermatogonia, which undergo meiosis to form sperm, and the Sertoli cells (nurse cells), which provide nourishment to the developing germ cells. The interstitial cells (Leydig cells), which secrete testosterone, are located in the spaces outside the seminiferous tubules, not inside them. Hence the tubules contain Sertoli cells and spermatogonia.

✓Final answer
$(D) Both (A) and (C) — Sertoli cells and Spermatogonia.$
CBSE 2026Set A1 markMCQ
$Q. In which structure of sperm are the enzymes present which help in fertilisation of the ovum?$
(a) Middle piece
(b) Neck
(c) Nucleus
(d) Acrosome
›Reveal solutionSolution

The acrosome, a cap over the sperm head, holds enzymes that help the sperm enter the egg.

The head of a sperm is covered by a cap-like structure called the acrosome. It is filled with hydrolytic enzymes (such as hyaluronidase) that digest and break down the outer coverings of the ovum (the zona pellucida), allowing the sperm to penetrate and fertilise the egg. The middle piece contains mitochondria for energy, the neck connects the parts, and the nucleus carries the genetic material — none of these carries the fertilising enzymes.

✓Final answer
$(D) Acrosome.$
CBSE 2026Set ANNUAL1 markMCQ
$Q. Acrosome is found in which part of the human sperm?$
(a) Tail
(b) Middle piece
(c) Head
(d) Neck
›Reveal solutionSolution

The acrosome is an enzyme-filled cap over the sperm's head that helps the sperm penetrate the egg's outer coverings.

A human sperm has a head, neck, middle piece and tail. The head contains an elongated, haploid nucleus, the anterior portion of which is covered by a cap-like structure called the acrosome, filled with enzymes (such as hyaluronidase) that facilitate fertilisation by digesting the egg's outer layers. The middle piece has numerous mitochondria that produce energy for tail movement; the tail (flagellum) enables sperm motility.

✓Final answer
$(c) Head.$
CBSE 2026Set ANNUAL1 markMCQ
$Q. Which of the following is not a part of male reproductive system?$
(a) Ampulla
(b) Prostate
(c) Foreskin
(d) Bulbourethral gland
›Reveal solutionSolution

Prostate, bulbourethral (Cowper's) glands and the foreskin are all male reproductive structures; the ampulla belongs to the female oviduct.

In the male reproductive system, the accessory glands (prostate, seminal vesicles, bulbourethral glands) add secretions to semen, and the foreskin (prepuce) covers the glans penis. The ampulla, by contrast, is the wide distal part of the female fallopian tube (oviduct), next to the infundibulum, where fertilisation usually takes place - it has no counterpart of that name in the male system.

✓Final answer
$(a) Ampulla.$
CBSE 2026Set ANNUAL1 markMCQ
$Q. Leydig cells are found :$
(a) in liver
(b) in testes
(c) in kidney
(d) in uterus
›Reveal solutionSolution

Leydig cells (interstitial cells) are found in the testes, between the seminiferous tubules.

Inside the testis, in the interstitial spaces between the seminiferous tubules, are small clusters of glandular cells called Leydig cells (interstitial cells). They are steroidogenic cells that synthesise and secrete the male sex hormone testosterone (androgen), which controls the development of secondary sexual characters in males and supports spermatogenesis. This is different from the Sertoli cells, which line the seminiferous tubules themselves and nourish the developing sperm cells.

✓Final answer
$(b) in testes.$
CBSE 2026Set ANNUAL1 mark
$Q. In which part of the body is the male reproductive system located?$
›Reveal solutionSolution

The human male reproductive system is located in the pelvic region.

Concept: The male reproductive system comprises the testes, accessory ducts (rete testis, vasa efferentia, epididymis, vas deferens), accessory glands and the external genitalia.

Why: These organs are situated in the lower part of the trunk. The paired testes are housed in the scrotum, a pouch that lies outside the abdominal cavity in the pelvic region to keep the temperature about 2–2.5 °C below core body temperature, which is essential for sperm formation.

✓Final answer
$The male reproductive system is located in the pelvic region (lower abdomen), the testes being held in the scrotal sac outside the body cavity.$
CBSE 2026Set ANNUAL1 markMCQ
$Q. The testes in humans are located outside the abdominal cavity within a pouch called the scrotum. This positioning helps in :$
(a) avoiding compression by internal organs.
(b) maintaining a temperature slightly lower than the body temperature for sperm formation.
(c) protecting the testes from physical injury during movement.
(d) helping in the storage of urine before excretion.
›Reveal solutionSolution

The scrotum keeps the testes cooler than the body core, and this lower temperature is required for sperm production, so (b) is correct.

In the CBSE/NCERT Human Reproduction chapter, the testes lie outside the abdomen in the scrotum. Spermatogenesis (sperm formation) proceeds normally only at a temperature 2-2.5°C below core body temperature. The scrotal sac provides exactly this cooler environment. If the testes are retained inside the abdomen (cryptorchidism), the higher temperature impairs sperm formation. Protection from injury and avoiding compression are minor benefits, not the primary functional reason.

✓Final answer
$(b) The scrotum maintains a temperature slightly lower than body temperature, required for sperm formation.$
CBSE 2025Set 57/4/11 markMCQ
$Q. Given below are a few statements with reference to the accessory ducts of the human male reproductive system :$
(i) The seminiferous tubules of the testes open into rete testis then into the vas deferens.
(ii) The vasa efferentia leave the testes and open into the epididymis.
(iii) The epididymis leads to vas deferens that ascends into the abdomen.
(iv) The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct.
(v) The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus. Choose the option with all true statements from the given options : (A) (i), (ii),
(iv) (B) (ii), (iii),
(v) (C) (ii), (iv),
(v) (D) (i), (iii), (iv)
›Reveal solutionSolution
This question tests knowledge of the correct sequence and connections of the accessory ducts in the human male reproductive system. Statements (ii), (iii), and (v) accurately describe these ducts, making option (B) the correct choice.

Concept and Intuition

The male reproductive system includes a network of accessory ducts that play a crucial role in the transport, storage, and maturation of sperm. Understanding the precise pathway sperm take from their production site in the testes to their exit from the body is key. This pathway involves a series of interconnected tubes, each with a specific function and anatomical location. Any deviation from this correct sequence or connection makes a statement false.

Evaluate Statement (i): "The seminiferous tubules of the testes open into rete testis then into the vas deferens."

Sperm are produced in the seminiferous tubules within the testes. From there, they move into the rete testis, a network of tubules. This part of the statement is correct.

However, from the rete testis, sperm do not directly enter the vas deferens. Instead, they pass through several small ducts called the vasa efferentia, which then lead into the epididymis. Only after passing through the epididymis does the duct continue as the vas deferens.

Therefore, this statement is false because it omits the vasa efferentia and epididymis in the sequence.

Evaluate Statement (ii): "The vasa efferentia leave the testes and open into the epididymis."

Following the rete testis, the vasa efferentia (also called efferent ductules) are indeed the ducts that emerge from the testes and transport sperm to the epididymis. The epididymis is a highly coiled tube located on the posterior surface of each testis, where sperm mature and are stored.

This statement accurately describes the anatomical connection.

Therefore, this statement is true.

Evaluate Statement (iii): "The epididymis leads to vas deferens that ascends into the abdomen."

The tail of the epididymis is continuous with the vas deferens (also known as the ductus deferens). The vas deferens is a muscular tube that ascends from the scrotum into the abdominal cavity, looping over the urinary bladder. It is a major component of the spermatic cord.

This statement correctly describes the continuation of the epididymis and the path of the vas deferens.

Therefore, this statement is true.

Evaluate Statement (iv): "The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct."

The vas deferens does not receive a duct from the prostate gland. Instead, each vas deferens joins with the duct of a seminal vesicle to form an ejaculatory duct. The seminal vesicles are a pair of glands that secrete a fluid rich in fructose and prostaglandins.

The prostate gland, a single gland located below the urinary bladder, secretes its fluid directly into the urethra, not into the vas deferens or ejaculatory duct in this manner.

Therefore, this statement is false due to the incorrect gland mentioned.

Evaluate Statement (v): "The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus."

In males, the urethra serves as a common pathway for both urine and semen. It originates from the urinary bladder, passes through the prostate gland, then through the penis, and finally opens to the outside at the urethral meatus (external urethral orifice).

This statement accurately describes the origin and path of the male urethra.

Therefore, this statement is true.

Based on the evaluation, the true statements are (ii), (iii), and (v). We now check the given options to find the one that includes all these true statements.

(A) (i), (ii), (iv) - Incorrect (i and iv are false)

(B) (ii), (iii), (v) - Correct

(C) (ii), (iv), (v) - Incorrect (iv is false)

(D) (i), (iii), (iv) - Incorrect (i and iv are false)

✓Final answer
$The option with all true statements is (B) .$
CBSE 2025Set ANNUAL1 markMCQ
$Q. Sertoli cells are present in :$
(a) Kidney
(b) Testis
(c) Liver
(d) Ovary
›Reveal solutionSolution

Sertoli cells occur in the seminiferous tubules of the testis.

Sertoli cells (nurse cells) line the walls of the seminiferous tubules inside the testis. They provide nutrition to the developing germ cells during spermatogenesis, secrete the hormone inhibin (which regulates FSH secretion through negative feedback), and are themselves stimulated by the pituitary hormone FSH. They are not present in the kidney, liver or ovary.

✓Final answer
$(ii) Testis$
CBSE 2025Set F1 markMCQ
$Q. Which of the following human cells is motile?$
(a) Nerve cell
(b) Cutaneous cell
(c) Egg cell
(d) Sperm cell
›Reveal solutionSolution

The sperm is the motile human cell.

The human sperm (spermatozoon) has a head, middle piece and a long tail (flagellum) whose lashing movements propel it through the female reproductive tract toward the egg, so it is a motile cell. Nerve cells, skin (cutaneous) cells and the ovum (egg) are non-motile; the egg is instead moved passively by the cilia and muscular activity of the fallopian tube.

✓Final answer
$(d) Sperm cell.$
CBSE 2025Set F1 markMCQ
$Q. From which of the following do developing sperms get nutrition?$
(a) Sertoli cells
(b) Germinal epithilium
(c) Blood cell
(d) Leydig cell
›Reveal solutionSolution
Developing sperms are nourished by Sertoli (nurse) cells inside the seminiferous tubules.

Inside the seminiferous tubules of the testis there are two important cell types:

Sertoli cells (nurse cells) — attached to the germinal epithelium; they provide nutrition and support to the developing germ cells/spermatids during spermatogenesis.

Leydig cells (interstitial cells) — lie outside the tubules and secrete the hormone testosterone.

Thus the developing sperms get their nutrition from Sertoli cells.

✓Final answer
$(A) Sertoli cells.$

Q.Given below are a few statements with reference to the accessory ducts of the human male reproductive system :

Concept and Intuition

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