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

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

Human transport system has two components, blood vascular system and lymphatic system. Blood Vascular System. It consists of blood, blood vessels (tube) and heart.

(1) Heart-It is pumping organ of blood vascular system.

(2) Blood- It is made up of plasma and three types of cells – red blood corpuscles, white blood corpuscles and blood platelets.

(a) Blood Plasma-

(i) Transport of nutrients, excretory materials, hormones etc.

(ii) Antibodies in the form of immunoglobins.

(iii) Prothrombin and fibrinogen proteins for blood clotting.

(b) Red Blood Corpuscles-Transport of oxygen as oxyhaemoglobin. Transport of about 23% carbon dioxide as carbaminohaemoglobin.

(c) White Blood Corpuscles-Phagocytosis of germ cells,

production of antibodies and histamine.

(d) Blood Platelets-Formation of thromboplastin for blood clotting.

(3) Blood Vessels- They are of Three Type

(i) Arteries. Taking away blood from heart to different body parts.

(ii) Veins. Transporting blood towards heart from various body parts.

(iii) Capillaries. Exchange of materials between blood and living cells through tissue fluid.

Lymphatic System. It consists of lymph, lymph vessels and lymph nodes.


(i) Collection of extra tissue fluid and passing it back into blood.

(ii) Picking up tissue secretions and passing into blood.

(iii) Attracting and carrying germs to lymph nodes.

Lymph Vessels. Collection of lymph and passing the same into veins.

Lymph Nodes.

(i) Lymph organs specialized to filter germs.

(ii) Maturation of lymphocytes.

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