Understand why many animals have a heart and circulation (mass transport to overcome limitations of diffusion in meeting the requirements of organisms).

HideShow resource information

Many organisms are single celled organisms (e.g. jelly larvae) which obtain all nutrients through diffusion.

Mass Transport System

It contains vessels for transport where a medium is used to transport nutrients (way of moving in the right way) so a mechanical pump (such as the heart) pushes the medium or nutrients around the organism.

The surface area to volume ratio of an organism determines if…


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Human, animal and plant physiology resources »