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Essay On Blood Circulatory System

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Blood circulatory system
The circulatory system of humans have the same 3 basic components.
(A) Circulating fluid the blood.
(B) The pumping organ the heart
(C) The blood vessels arteries, capillaries, and veins.
The circulating Fluid the Blood.

The blood is the medium in which dissolved nutrients, gasses, hormones, wastes are transported through the body.It is made up of two main components as, plasma and cells or cell-like bodies(white blood cells, red blood cells, and platelets.
The weight of the blood in our body is about 1/12th of our body
PLASMA
It has been estimated that in a normal person plasma constitutes about 55% by volume of the blood, and cells or cell-like bodies about 45% volume of the blood. Plasma is primarily water in which proteins, salts, nutrients, and waste are dissolved. Water constitutes about 90% of plasma, 10% are dissolved substances. Most of the dissolved …show more content…

ii) Blood helps to transport materials, in the body including nutrients, water, salts and waste products. All hormones are transported by blood from the endocrine tissue to the target cells.
3. Gasses O2 and CO2 are transported by blood.
4. Blood helps in body defenses against disease, neutrophils, and monocytes engulf and destroy invading microorganisms e.g. bacteria.
5. Blood provides immunity by the lymphocytes.
6. Blood produces interferon and antitoxins which are proteins and protects our body from nucleic acids and toxins of invading organism.
7. Blood acts as a buffer to maintain the acid-base balance.
8. Helps in maintaining the body temperature, the concentration of water and helps in homeostasis.
9. Walls of blood helps in the exchange of materials between blood and blood through blood capillaries via an interstitial

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