Question

describe three different ways in which living organism breath

Answer 1

Answer:

lungs(human) by nose

gills(fish) by gill

tracheal systemby skin

Answer 2

Answer:

1. Through Plasma Membrane

In unicellular animals, such as amoeba, exchange of gases takes place through cell surface. They absorb oxygen from the surrounding air or water and give out carbon dioxide through plasma membrane by diffusion.

2. Through Body Wall or Skin

Tapeworms, earthworms, and leeches use their skin for the exchange of gases. The skin of Earthworms is very thin and moistened. Many blood cells are spread on this skin. These blood cells are known as capillaries. The exchange of gases occurs at capillaries. They die of suffocation if their skin is dried up.

3. Through Gills

A majority of aquatic animals like fish and prawns breathe through special organs called gills.

4.Through lungs

Amphibians, mammals, and birds exchange gases through special respiratory organs called lungs.

Explanation:

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