Question

1) Name the structures responsible for gaseous exchange in the following organisms-

(a) Fish
(b) Cockroach
(c) Amoeba​

Answer 1

Answer:

1. Fish and other aquatic organisms use gills to take up oxygen dissolved in the water and diffuse carbon dioxide out of the bloodstream. Some insects utilize a tracheal system that transports oxygen from the external environment through openings called spiracles.
2. In cockroach, respiration occurs through spiracles – a small opening on the sides of its body. When air through external openings, enters into its respiratory system, spiracles serve as muscular valves paving way to the internal respiratory system. The respiratory organ of cockroach is referred to as tracheae.
3. Gas exchange takes place by diffusion across the cell membrane of the amoeba.

Answer 2

Answer:

a) FISH is the responsible for gaseous exchange in the following organisms