Question

Which among the following is the correct order of excretory organs in cockroach, earthworm and rabbit respectively?

• A. Skin, Malpighian tubules and kidney
• B. Malpighian tubules, nephridia and kidney
• C. Nephridia, Malpighian tubule and kidney
• D. Nephridia, kidney and green gland

Answer 1

The correct option is B Malpighian tubules, nephridia and kidney

The excretory organ of cockroach is the Malpighian tubules. It is found at the junction of the midgut and hindgut and are about 150 in number.

Earthworm has a pair of excretory organs, called as the nephridia. Each nephridia is made up of a coiled tube that opens into the body cavity.

The excretory system of rabbit consists of a pair of kidneys, a pair of ureters, an urinary bladder, an urino-genital canal and the urino-genital aperture.