Structural Orga...

In 4th, 5th and 6th segments of Earthworm, lying above the pharyngeal mass and connected with pharyngeal glands are found small, red coloured follicular bodies called 

Flow of haemolymph in Cockroach is

Number of pairs of valves found in lateral oesophageal heart of Pheretima is

If a live Earthworm is pricked with needle on its outer surface without damaging its gut, the fluid that comes out is

Which is correct in common Cockroach

Nephridia of Pheretima are

Read the statement regarding myofibril and choose the correct option:
1. Each myofibril has alternate dark and light bands.
2. In the center of each A band is an elastic fiber called Z-line.
3. A and I bands are arranged alternately throughout the length of myofibril.
4. The sarcomere is the functional unit of contraction.
5. The central part of thick filament not overlapped by a thin filament is the M line.

Which of the following statements is incorrect pertaining to cockroach.

What happens if ophthalmic branch of trigeminal is cut in frog?

A frog with crushed brain is pinched on the leg. The leg is drawn away. It is