Question

Briefly explain how respiration takes place in: a) Lower Organisms b) Insects c) Frogs​

Answer 1

Answer:

In simple unicellular animals like Amoeba, respiration takes place by the simple diffusion of gases through the cell membrane. Most of the animals have, however, specific organs for respiration. The animals like earthworms which live in the soil use their skin to absorb oxygen from air and remove carbon dioxide.

Answer 2

a) Lower Organisms :

In simple unicellular animals like Amoeba, respiration takes place by the simple diffusion of gases through the cell membrane. Most of the animals have, however, specific organs for respiration. The animals like earthworms which live in the soil use their skin to absorb oxygen from air and remove carbon dioxide.

b) Insects :

For insects, respiration is separate from the circulatory system. Oxygen and carbon dioxide gases are exchanged through a network of tubes called tracheae. Instead of nostrils, insects breathe through openings in the thorax and abdomen called spiracles.

c) Frogs:

Respiratory system is comprised of the organs that help in the intake and supply of oxygen to the tissues as well as to get rid of excess carbon dioxide. Branchial respiration occurs in case of tadpoles or larval stage. Branchial respiration takes place by means of external gills.