Body Fluids and Circulation for NEET | Part 1 | Body Fluids - Videos

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Body Fluids and Circulation
Blood is a connective tissue which is composed of a fluid matrix (plasma) and formed elements.

Plasma: Plasma is a straw-coloured and viscous fluid. Plasma constitutes about 55% of the blood. About 90% of plasma is water and about 6-8% is composed of proteins. The major plasma proteins are; fibrinogen, globulins and albumins. Fibrinogen play important role in blood coagulation. Globulins are mainly involved in defense mechanism and albumins help in osmotic balance. Small amounts of minerals; like Na+, Ca++, Mg+ +, HCO3– and Cl–; are also present in plasma. Plasma also contains glucose, amino acids, lipids, etc. because these substances are always in transit in the body. Factors for clotting of blood are present in the plasma in an inactive form. Plasma without the clotting factors is called serum.

Formed Elements: The formed elements constitute about 45% of the blood. Erythrocytes, leucocytes and platelets are collectively called formed elements.

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