- the fluid that surrounds cells in tissues.
- made from substances that leave the blood such as oxygen, water and nutrients.
-the cells take the substances from thefluis and release matabolic waste.
- at the start of the capillaries the pressure is high therefor substances move down the concentration gradient
- the substances fill the spaces around the cells, forming tissue fluid.
- as fluid has left the pressure is much lower at the end of the capillaries
- some water re-enters the capillaries by osmosis
- excess tissue fluid passes into lymph vessels where it becomes lymph
- lymph travels through lmphatic cappillaries to lymphatic vessels in the thorax until it's returned to the blood near the heart.
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