REGULATION OF INTERNAL ENVIRONMENT #2

HOMEOSTASIS OR OSMOREGULATION IN UNICELLULAR ORGANISM

A unicellular organism such as Amoeba and paramecium posses contractile vacuole which enables them to carry out osmoregulation. The cell content of these animals is hypertonic to the external medium hence water enter them by osmosis into the cytoplasm and then into the contractile vacuole. In order to prevent the cell from being over turgid and bursting, the contractile vacuole discharges its content from time to time thereby maintaining water balance within the organism.

PART INVOLVED IN HOMEOSTASIS

Parts of the body which are involved in homeostasis are:-

• Kidneys
• Liver
• Skin
• Ductless gland
• Brain