The functioning of larger animals

Abstract

It is obvious that large animals consisting of millions of cells face many more problems than single-celled organisms. Even in large animals, however, each single cell is bathed in fluid, usually known as the extracellular or interstitial fluid. This fluid is not in free and easy communication with the surroundings of the animal. This chapter is concerned with the ways in which large animals, including human beings, cope with the difficulties posed by their size.