Q.Prepare a list of some animals that are found parasitic on human beings.

Several animals from different groups live as parasites on or inside human beings, drawing nourishment from the human host:

• Taenia, the tapeworm — a flatworm that lives as an endoparasite in humans.
• Fasciola, the liver fluke — another parasitic flatworm.
• Ascaris, the roundworm — a parasitic roundworm found in humans.
• Wuchereria, the filaria worm — a roundworm causing filariasis.
• Ancylostoma, the hookworm — a parasitic roundworm. …

A number of animals live at the expense of human beings, attaching to or living inside the body and taking their food from it. Most of the familiar ones come from two groups whose members are well suited to a parasitic life.

From the flatworms (phylum Platyhelminthes), which are largely endoparasites equipped with hooks and suckers to hold on to the host, and some of which absorb food directly through the body surface:

• Taenia — the tapeworm.
• Fasciola — the liver fluke.

From the roundworms (phylum Aschelminthes), which include many parasitic forms living inside animals:

• Ascaris — the roundworm.
• Wuchereria — the filaria worm.
• Ancylostoma — the hookworm. …

Method: Categorise by phylum life-cycle, then recall

Rather than listing named parasites directly from memory, work outward from the two phyla known to contain human endoparasites and recall which specific worm within each phylum matches which disease/organ, using the parasite's own life cycle as the memory hook.

Step 1 — identify the parasite-heavy phyla. The chapter singles out Platyhelminthes (flatworms) and Aschelminthes (roundworms) as the two groups containing the bulk of human parasites, because both are built for endoparasitic life (hooks/suckers or a durable cuticle, resistant eggs, simple reproduction).

Step 2 — within Platyhelminthes, recall by body location. A worm that lives coiled in the intestine and absorbs nutrients through its whole flattened, ribbon-like body (no gut of its own) is the tapeworm, Taenia. A worm that instead migrates through the liver and bile ducts is the liver fluke, Fasciola.

Step 3 — within Aschelminthes, recall by symptom/organ. A large roundworm living in the intestine, often diagnosed from stool, is Ascaris. A thread-like worm that blocks lymphatic vessels, causing the swelling of filariasis, is Wuchereria. A small worm that attaches to the intestinal wall and feeds on blood, causing anaemia, is the hookworm, Ancylostoma. …