Q.Visceral layer : Podocytes :: PCT : _______

Podocytes are the specialised cells that form the inner (visceral) layer of Bowman's capsule, and their filtration slits are essential to glomerular ultrafiltration.

Each nephron begins with a double-walled cup-shaped structure, Bowman's capsule, which encloses a tuft of capillaries called the glomerulus. The inner wall of Bowman's capsule is lined by specialised cells called podocytes, which have foot-like projections (pedicels) that interdigitate, leaving narrow gaps called filtration slits or slit pores. Blood is filtered through the glomerular capillary wall, the basement membrane, and finally through these podocyte filtration slits into the capsular space, forming the glomerular filtrate — this three-layered arrangement constitutes the filtration membrane of the kidney.

A human kidney contains roughly one million nephrons, each an independent structural and functional filtering unit.

The nephron is the structural and functional unit of the kidney, consisting of the glomerulus and Bowman's capsule (together the malpighian body) followed by the proximal convoluted tubule, loop of Henle, distal convoluted tubule and collecting duct. Each human kidney is estimated to contain approximately one million (about 10 lakh) such nephrons, working together to filter blood plasma, reabsorb useful substances, and form urine.

The nephron is the structural and functional unit of the human kidney; each kidney contains about a million nephrons.

Each nephron consists of a Bowman's capsule (surrounding a tuft of capillaries called the glomerulus), the proximal convoluted tubule, the loop of Henle, and the distal convoluted tubule opening into a collecting duct. Together these parts:

1. Filter blood at the glomerulus (glomerular filtration) to form the filtrate.
2. Reabsorb useful substances (glucose, amino acids, most water and ions) back into blood along the tubule.
3. Secrete additional wastes (like H+, K+, ammonia) into the tubule.

Since the nephron as a whole carries out all these steps and is the repeating structural unit that makes up the kidney, it is termed the structural and functional unit. The glomerulus (option a) is only the filtering capillary tuft, a part of the nephron. The ureter (option b) is the tube carrying urine from kidney to bladder, and the hilum (option d) is just the notch where vessels/ureter enter/leave the kidney — neither performs the actual urine-forming function.

Bowman's capsule is part of the nephron.

The nephron is the structural and functional unit of the kidney. Its first part is the cup-shaped Bowman's capsule, which surrounds the glomerulus and receives the filtrate. So Bowman's capsule is a part of the nephron.

The nephron is the unit of the kidney.

Each kidney contains about a million nephrons, each consisting of a Malpighian body (glomerulus + Bowman's capsule) and a renal tubule. The nephron is therefore the structural and functional unit of the kidney; the ureter merely carries urine, and the glomerulus is only a part of the nephron.

Glomerulus + Bowman's capsule = Malpighian corpuscle / renal corpuscle, a term not listed among the choices.

Each nephron begins with a tuft of capillaries called the glomerulus, which is enclosed within a double-walled cup-shaped structure called Bowman's capsule. Together, the glomerulus and Bowman's capsule constitute the Malpighian corpuscle (also called the renal corpuscle), the filtration unit of the nephron. The Proximal Convoluted Tubule, Distal Convoluted Tubule and Henle's Loop are the tubular parts of the nephron that come AFTER the renal corpuscle, so none of them is the correct name for the glomerulus + Bowman's capsule unit.

The functional unit of the kidney is the nephron; each kidney has about a million of them, and each one filters blood and forms urine.

The kidney is a compound organ, but its work of filtering blood and making urine is done by repeating microscopic units called nephrons (uriniferous tubules). Each human kidney has roughly one million nephrons.

A nephron has two main parts:

• Malpighian body (renal corpuscle): a cup-shaped Bowman's capsule enclosing a tuft of capillaries called the glomerulus, where blood is filtered.
• Renal tubule: the proximal convoluted tubule (PCT), the loop of Henle, and the distal convoluted tubule (DCT), which open into a collecting duct. These carry out selective reabsorption and secretion to convert the filtrate into urine.

Because all three processes of urine formation — glomerular filtration, reabsorption and tubular secretion — take place within it, the nephron is the structural and functional unit of the kidney.

The nephron is the basic unit of the kidney, responsible for filtration of blood and formation of urine; each kidney contains roughly a million nephrons.

Each nephron consists of a Malpighian/renal corpuscle (glomerus + Bowman's capsule, where blood filtration occurs) and a renal tubule (proximal convoluted tubule, loop of Henle, distal convoluted tubule) that reabsorbs useful substances and secretes wastes, eventually delivering urine to the collecting duct.

• (a) 'Nepridia' (nephridia) are the excretory units of annelids like earthworms, not the human kidney.

• (b) Henle's loop is only a part of the nephron (the tubule segment), not the whole functional unit.

• (d) Pyramid refers to the renal (medullary) pyramids, gross anatomical regions of the kidney, not the microscopic functional unit.

Bowman's capsule, together with the glomerulus it encloses, forms the renal corpuscle at the start of the nephron's renal tubule.

Each nephron (the functional unit of the kidney) begins with a cup-shaped Bowman's capsule that surrounds a tuft of capillaries called the glomerulus; together they form the Malpighian/renal corpuscle, where blood filtration begins. Bowman's capsule is directly continuous with the rest of the renal tubule — the proximal convoluted tubule, the loop of Henle, and the distal convoluted tubule — through which the filtrate passes as urine is formed.

The nephron is the structural and functional unit of the kidney; each kidney contains about a million nephrons.

Each nephron consists of a renal corpuscle (glomerulus + Bowman's capsule) that filters blood, followed by a renal tubule (proximal convoluted tubule, loop of Henle, distal convoluted tubule) that reabsorbs useful substances and secretes wastes, finally draining urine into a collecting duct. This entire sequence of filtration, reabsorption, and secretion happens independently within each nephron, which is why it is called the functional unit. Alveoli (b) are the gas-exchange sacs of the lungs, Capsule (c) refers only to the outer fibrous covering (Bowman's capsule is only part of the nephron, not the whole functional unit), and Medulla (d) is just the inner region of the kidney containing parts of many nephrons, not a single functional unit.

Podocytes are specialised epithelial cells with foot-like processes covering the glomerular capillaries; the filtration slits between their pedicels allow ultrafiltration of blood plasma into Bowman's capsule while re...

Podocytes form a selective filter around glomerular capillaries, letting small molecules pass into Bowman's capsule while holding back cells and large proteins.

Podocytes are specialised cells that make up the inner (visceral) layer of Bowman's capsule and are wrapped tightly around the glomerular capillaries in the nephron. Each podocyte extends numerous finger-like foot processes (pedicels) that interdigitate with those of neighbouring podocytes, leaving narrow gaps between them called filtration slits. Together with the capillary endothelium and the basement membrane, these filtration slits form a size-selective filtration barrier: small molecules such as water, glucose, amino acids, salts, and nitrogenous wastes (urea) can pass freely through into the lumen of Bowman's capsule as glomerular filtrate, while blood cells and large plasma proteins are held back in the bloodstream. This selective ultrafiltration performed with the help of podocytes constitutes the first, crucial step of urine formation.