Question

10. Why do the flaps on both sides of the fish head alternately open and close ?
A) To take in water
B) To take in oxygen
C) To let the water out
D) To release oxygen out​

Answer 1

Answer:

these are flaps which cover the gills. These lips open and close alternately. on the basis of these observations explain the process of respiration in the fish. ... Fish use the process known as countercurrent flow, in which water and blood flow in opposite directions across the gills, maximizing the diffusion of oxygen

Answer 2

Answer:

D) to release the oxygen out

Explanation:

YOU WILL FIND FLAP LIKE STRUCTURES ON BOTH SIDES OF THEIR HEADS. THESE ARE FLAPS WHICH COVER THE GILLS. ... The gills contain filaments that have lamellae which increases the surface area of the gills to extract more oxygen from water. In this way fish open and closes the lid alternately for respiration.