Question

Excretory organs of Flatworms / Taenia are
a. Flame cells
b. Nephridia
c. Malpighian tubules
d. Renette glands

Answer 1

Hint: Excretory organs of flatworms are cup-shaped with flagella covering the inner portion of the cup. They function like a kidney and play an important role in the process of excretion and osmoregulation.

Complete answer:
Flatworms are a group of soft-bodied invertebrates. They are also called platyhelminthes (Gr. platy means “flat” and helminth means “worms”). Flatworms include flukes, planarians and tapeworms. Taenia is a genus of tapeworms that cause taeniasis and cysticercosis in humans. They have tape or ribbon-like bodies (Gr. tainai meaning ribbon).

Excretory system is very well developed in flatworms. It consists of single or paired protonephridia with flame cells. The excretory organs of Flatworms / Taenia are flame cells. Flame cells function like a kidney. They are cup-shaped. It is mainly concerned with excretion as well as osmoregulation.

> Option B: Nephridia are excretory organs of annelids. They are found in pairs and perform functions similar to kidney. It eliminates the waste products from the body to the exterior. It also maintains the water balance of the body.

> Option C: Malpighian tubules are the excretory organs of insects and arthropods. They are found in pairs in the posterior regions of arthropod alimentary canal. It removes water and wastes in the form of solid nitrogenous compounds.

> Option D: Renette glands are specialized excretory cells which are mostly found in nematodes, commonly called roundworms. They belong to the Phylum Nematoda. Renette glands are mainly involved in the process of digestion and excretion. If renette glands are not present in nematodes then the process of digestion and excretion will not take place in them.

Hence, the correct answer is option (A).

Note: Excretion is the process by which metabolic wastes are eliminated from the body of an organism. Excretion is an essential life process. Excretory organs are different in different animes like flame cells in flatworms, nephridia in annelids, malpighian tubules in arthropods, renette glands in nematodes, kidney in human beings etc.