Question

State the various levels of organisation found in the animal kingdom.

Answer 1

The animal kingdom is also classified on the basis of the level of organization other than symmetry, germ layers, and body cavity. Though the animals are multicellular, the level of organization varies from cellular and tissue level.

Cellular level: In this structural organization, each cell of the organism performs all life process e.g., Porifera.

Tissue level: In this structural organization, a tissue is made up of group similar type of cells that perform same functions and group of the same type of tissues forms organs. Such organs perform a specific function for the body.

Organ System level : Various organs functioning in a coordinated manner.