Water Balance & Excretion 9.4 & 9.5. Osmoregulation active regulation of the osmotic pressure of bodily fluids and cells osmotic pressure = pressure resulting.
The Excretory System 9.5. Unicellular Organisms water balance is often maintained by contractile vacuoles video of Paramecium: .
The Excretory System 9.5. Excretory System Two main functions: concentrates wastes & removes them from the body regulates fluids & water within the body.
