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

Q. 1.     What are the components of the transport system in human beings? What are the functions of these components?

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The transport/circulatory system in human beings consists of the following three parts:

(i) Blood: Blood is the medium for transportation of all kinds of materials like oxygen, carbon dioxide, digested food, and waste material from one part of the body to the other.

(ii) Blood Vessels: The intricate network of blood vessels consisting of arteries, veins, and capillaries run through the entire body and the transportation of materials like oxygen, carbon dioxide, digested food, and waste material from one part of the body to the other takes place through the blood vessels only. 

(iii) Heart: The heart pumps the blood through the blood vessels. Deoxygenated blood containing Carbon dioxide reaches the heart from different parts of the body and is pumped to the lungs through veins for releasing carbon dioxide and absorption of oxygen. Oxygen-rich blood reaches the heart from the lungs and is pumped through arteries to the tissues and organs where oxygen is required.

(iv) Lymphatic system: It is a system of tissues, vessels, and organs that work together to circulate lymph throughout the body, carrying lymphocytes. The lymphatic system helps protect the body from disease-causing microorganisms (pathogens) and maintains the balance of bodily fluids.

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