Question

Compare the composition of blood, tissue fluid, and lymph?

Answer 1

• Blood contains `to` red blood cells, white blood cells, platelets and plasma which constitutes water, proteins, hormones, `O_2`, `CO_2`, glucose, salt, enzymes.
• Tissue fluid contains `to` `O_2`, `CO_2`, sugars, salts, amino acids, hormones, coezymes & white blood cells.
• Lymph contains `to` `CO_2`, proteins, glucose and white blood cells.

Explanation:

Blood that is red fluid flows through arteries, veins & capillaries. These all are vessels of circulatory system which transport nutrients contained within blood to various body parts. Blood contain highest amount of oxygen as it contains red blood cells.

All the constituents of the blood which manage to escape from walls of blood capillaries, form tissue fluid also known as interstitial fluid. This escaped stuff surrounds all the body tissues and bathe them. Red blood cells & plasma proteins i.e albumin, fibrinogen, immunoglobulins etc being larger in size can't escape and hence are not present in tissue fluid. However, it contain proteins secreted by body cells. It contains less glucose, proteins, `O_2` & more `CO_2` as compared to blood.

When tissue fluid gets enclosed in lymph capillaries then it is called lymph. So it's composition is not that different from tissue fluid. It just contain a little bit lower amount of proteins, glucose and `O_2`. It contain greater amount of fats than both others. When lymph gets filtered in lymph nodes via lymph cells then this fluid is transferred back to the blood.

Hope it helps...