The fluid that bathes and surrounds the cells (intercellular spaces)
Composed of: water, sugar, salt, hormones, co-enzymes, fatty acids, amino acids, neurotransmitters, cellular products
Provides a means of delivering materials to the cells (intercellular communication), and removal of metabolic waste products.
The pressure exerted by fluid (e.g. water) at rest
Increases in direct proportion to the density and depth of the fluid