What are the components of transport system in human beings? What are the functions of these components?

Dear Student

In human beings the transport system consists of the following:
(i)Heart:It acts as a pumping organ.
(ii)Blood:It is the transport medium. It is made up of:
(a)Plasma–It carries food molecules, nitrogenous wastes, salts, carbon dioxide, hormones proteins etc. in a dissolved form.
(b)RBC–Consists of haemoglobin and transports oxygen.
(c)WBC–Helps to fight infection.
(d)Platelets–Helps in the clotting of blood.
(iii)Blood vessels:
(a)Arteries–Carry oxygenated blood away from the heart to each and every cell.
(b)Veins–Bring de-oxygenated blood to heart for purification.

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