Course Content
TRANSPORT IN PLANTS AND ANIMALS
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EXCRETION AND HOMEOSTASIS
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Biology Form 2
About Lesson

Role of the Skin in Salt and Water Balance     

The sweat glands secrete waste products of metabolism like; water and mineral salts especially sodium chloride.

Sweat is 99% water and the remaining 1% is mainly mineral salts.

The water and mineral salts lost in the sweat contribute to osmotic changes of the body cells and fluids.

On a hot day, the body loses a lot of water and some mineral salts, resulting in a sensation of thirst being felt due to tissue dehydration.

The osmotic balance is however, restored by drinking large volumes of water and intake of mineral salts in the diet.

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