Transportation in human beings

Transportation : Transportation in human beings-

Blood - (i) It is a fluid connective tissue.     

(ii) Components - 

(a) Fluid medium- Plasma    

(b) Red blood corpuscles     

    

(c) White blood corpuscles    

    

 (d) Platelets suspended in plasma

Note: RBC – Erythrocytes- It is disc shape and having colour pigment Haemoglobin which provide red colour. It transport oxygen to all part of body

WBC – leukocytes – It produces antibodies that protect us from disease causing micro organism.

Platelets: Thrombocytes - It help in clothing of blood 

(iii) Plasma transports food, Oxygen, Carbon dioxide, Nitrogenous wastes, etc.

Functions of blood - 

(i) Transport of respiratory gases.  

(ii) Transport of nutrients. 

 (iii) Transport of waste products.  

(iv) Defence against infection

Blood vessels- 

(i) Arteries 

(ii) Veins 

(iii) Capillaries