Question

how does wastage of gases occurs in the following: a. fish b. cockroach​

Answer 1

Answer:

The exchange of gas is commonly

occurring in gills for fish and through

spiracles for cockroach.

Explanation:

1) The breathing organ called gills in the

fish is covered by operculum.

2) The oxygen dissolved in water is taken

in by the fish in its mouth which is then

passed through the gills in a way that the

blood in it picks up the oxygen and flow

in the opposite direction for absorption.

3) Carbon dioxide gain is released

through the gills.

4) Insects like cockroaches and

earthworms have small spiracles in their

body connected to Trachea through

which they take in oxygen and release

carbon dioxide.