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Blood, Tissue Fluid and Lymph

Blood consists of a watery fluid called plasma. The plasma contains dissolves substances such as oxygen,
carbon dioxide, salt, glucose, fatty acids, amino acids, hormones and plasma proteins as well as cells such
as erythrocytes, leucocytes and platelets.

Tissue fluid is similar to blood but…

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Not all the tissue fluid returns to the blood capillaries. Some is drained away by the lymphatic system which
consists of a number of vessels (tubes) which are similar to capillaries. They start in the tissues and drain
excess fluid into larger vessels, which eventually rejoins the blood system in…

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