Question

The excretory organs of prawns are

A. Malpighian Tubules

B. Nephridia

C. Kidneys

D. Green glands

Answer 1

Hint: For small aquatic crustaceans with an exoskeleton and ten legs, Prawn is a common name for (which is a member of the order Decapoda). Within the second antennae, which are the second set of appendages, the excretory organs of prawns are connected to the anterior part of the body. The excretory organs are composed of an endsac, a maze, and a bladder.

Complete answer:

Different forms of prawn excretory system include the following:

- A pair of green glands-the pair of excretory organs on each side of the decapod crustaceans' head area, emptying at the bottom of the antennae.

- Renal or nephroperitonic sac: a broad, thin-walled sac above the stomach of the heart.

- Integument: It is an essential excretory organ because, during the moulding of the chitinous integument, the nitrogenous waste present in the integument is extracted.

Green glands also referred to as antennal or maxillary glands are one of the pairs of excretory organs that help to perform excretory functions in crayfish on either side of the head area of decapod crustaceans, emptying at the base of the antennae. By extracting harmful substances and waste products in their urinary and circulatory systems, these glands function just like kidneys in humans and help crayfish stay safe.

Hence, the correct answer is option (D).

Note: Green glands, like crustaceans, are the excretory organs of certain arthropods. As these glands are found near the base of larger antennas, they are also called antennal glands. There are three sections of the end sac, the maze and the bladder in each gland. The proper excretory gland is the labyrinth. Green glands, therefore, assist in excretion.