WJEC GCSE Biology/Biology 1/Homeostasis

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What is homeostasis? Homeostasis is defined as a process in which concentrations of material within and outside of cells of organisms are regulated.

Organs of homeostasis Kidney Liver Skin

Kidney is a reddish brown organ that has bean shape; it is located at the dorsal part in the abdominal region of the body.it performed the following functions 1 regulation of water content in the blood. 2__maintaining the acid_base balance 3_excretion of waste nitrogenous substances.


This is the largest gland in the body it surrounded by the following associate organ hepatic vein, hepatic portal vein, hepatic artery ,bile duct and gall bladder.

Functions of liver. .1_..control of blood sugar 2_Detoxification 3_Production of bile. 4_Production of heat. 5_Delamination. 6_Storage of glucose in form of glycogen. Etc

SKIN This is the outermost part of the body which is mostly come in contact with environmental challenge and it protect the innermost tissue

Functions of skin. 1_Protection of internal organs.against germ ,Deity and injury. 2_regulations of body temperature through process of vast construction and vaso dilations.