Osmo referring to osmosis
Regulation referring to control
The tissue fluid which surrounds the cells in our body must be isotonic whith the cytoplasm of these cells. This means that the amount of water going into and out of these cells is equal and the cells will remain the same size, shape and maintain their function.
The danger to the tissue is that blood curculating into the tissue, would be concentrated causing a hypertonic (remove too much water) tissue fluid or very dilute cause a Hypotonic(add too much water) tissue fluid.
To maintain an isotonic, the composition of blood must be controlled.
Blood forms the tissue fluid.
The role of the kidney, is to control the composition of our blood.
Excess water and salts can be removed and excreted down through the ureter.
By controlling the content of water and salts in the blood, the kidney keeps the blood and therefore tissue fluid isotonic with the cell cytoplasm which maintains the function of the cells.
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