Ncert Exercises & Solutions

Complete the following statement.

1. In cockroach grinding of food particle is performed by......... .

2. Malpighian tubules help in removal of ......... .

3. Hind gut of cockroach is differentiated into......... .

4. In cockroach blood vessels open into spaces called ......... .

(a) Gizzard it is a muscular and greatly folded structure which marks the end of foregut and bears six plates with teeth for crushing and grinding the food.

(b) Malpighian tubules They help in the removal of nitrogenous wastes in arthropods, hence are excretory in function.

(d) Haemocoel It is the body cavity of cockroach divided into sinuses and contains visceral organs of cockroach floating in haemolymph.

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