Question

............... (19) is the vital link between blood and tissues by which essential substances pass from blood to cells and excretory substances from cells to blood. So it is called ............. (20) of our body.

Answer 1

Answer:

(19) LYMPH

(20) POSTMAN

Explanation:

Hope it helps

Answer 2

Answer:

(19) Lymph,

(20) middle man

Explanation:

• The lymph is a colourless or slightly, yellowish, alkaline fluid in lymphatic vessels. It contains a large number of leucocytes (Mostly lymphocytes).

• It is derived from the blood plasma as an ultrafiltrate of capillaries. It carries some oxygen and the final product of digestion to be supplied to the tissue fluid.

• Thus Lymph is that vital connection between blood and tissues. As the lymph receives oxygen and nutrients from the blood and passes to the tissues and drains excretory matter from tissue to blood, thus it acts as a middleman between blood and the tissue.

Thus (19) Lymph, (20) middle man.