Question

In animal where the body size is small, diffusion pressure is sufficient to distribute the oxygen through the body but when body size is large how this phenomenon get takes place.  Tissue system  Division of labour

Answer 1

Large animals have a large number of cells.

As the animal gets larger, it has most of its cells not exposed to the environment.

It therefore needs other means for oxygen supply since oxygen cannot reach its cells through diffusion from the environment.

This is made possible by the circulatory system in large organisms.

The Circulatory system is the means through which materials like respiratory gases, nutrients, hormones, intermediate metabolic products and metabolic end products are transported to and from all body tissues

Answer 2

Answer:

Explanation:

Large animals have a large number of cells.

As the animal gets larger, it has most of its cells not exposed to the environment.

It therefore needs other means for oxygen supply since oxygen cannot reach its cells through diffusion from the environment.

This is made possible by the circulatory system in large organisms.

The Circulatory system is the means through which materials like respiratory gases, nutrients, hormones, intermediate metabolic products and metabolic end products are transported to and from all body tissues