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Saturday 13 February 2010

Transport In Man


Blood Circulatory System (Cardio-vascular system)
The fluid circulatory system, with blood as the transporting material has assumed its highest development in man. It consists of a powerful heart, arteries, veins and capillaries.

Blood: Blood is viscous, red fluid connective tissues, comprising a colorless plasma in which the blood corpuscles float.

Plasma: It constitutes about 55% of the blood. It is a viscous fluid containing a mixture of inorganic salts in true solution form and blood proteins (albumins, globulins and fibrinogen) in colloidal form. In addition, plasma contains glucose, amino acids, triglycerides, urea, hormones, enzymes and auto toxins. The water is the most abundant component and forms 90% of plasma. The dissolved substances are only 10%.
Blood Corpuscles: These are the blood cells which form the remaining 45% of the blood.

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