Ncert Exercises & Solutions

Respiration in insects is called direct because

1.	the cells exchange O₂/CO₂ directly with the air in the tubes
2.	the tissues exchange O₂/CO₂ directly with coelomic fluid
3.	the tissues exchange O₂/CO₂ directly with the air outside through body surface
4.	tracheal tubes exchange O₂/CO₂ directly with the haemocoel with tissues which then exchange with tissues

(a) Insects have a network of tubes (tracheal tubes) to transport atmospheric air with in the body. these openings lead to trachae. the cells exchange O₂/CO₂ directly with the air in the spiracles present on insect body.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions