NEETZoologyStructural Organisation in Animals
Which of the following statements correctly describes the Malpighian tubules in a cockroach?
Options
- AThey are a ring of 6-8 blind tubules present at the junction of the midgut and hindgut that secrete digestive
- BThey are a ring of 100-150 yellow-coloured thin filamentous tubules present at the junction of the midgut and
- CThey are a ring of 100-150 yellow-coloured thin filamentous tubules present at the junction of the foregut and
- DThey are a ring of 100-150 yellow-coloured thin filamentous tubules present at the junction of the midgut and
Correct answer
B. They are a ring of 100-150 yellow-coloured thin filamentous tubules present at the junction of the midgut and
Step-by-step solution
In a cockroach, Malpighian tubules are the principal excretory organs. They are a ring of 100-150 yellow-coloured, thin filamentous tubules present at the junction of the midgut and hindgut. They help in the removal of excretory products from the haemolymph. Hepatic caeca (gastric caeca) are a ring of 6-8 blind tubules present at the junction of the foregut and midgut, which secrete digestive juice. Therefore, statements placing Malpighian tubules at the foregut-midgut junction, assigning them a digestive function,