Question

Write a short note on blood.

Answer 1

1.Blood carries oxygen to all parts of the body. 2.Blood transports digested food from the intestine to those organs where they are either stored or utilized. 3.It regulates body temperature. 4.It protects against diseases by destroying the disease-causing germs. 5.It prevents excessive bleeding by blood clotting. 6.Blood gets its color due to the pigment haemoglobin present in it. 7.There are two types of blood cells.They are: a.Red Blood corpuscles(RBC's) and b.White Blood corpuscles(WBC's) 8.Blood contains three blood vessels.They are: a.Artery b.Vein c.Capillaries

Answer 2

$\huge\textbf{What is Blood..?}$

Blood is a fluid which gives us life, health and growth... It is a special connective tissue constituting a fluid matrix, plasma and formed elements.
________________________________

$\textbf{FUNCTIONS}$

→ Transport of oxygen :- 

A small amount of oxygen is carried by plasma as it's aqueous solution from lungs to tissues for oxidation of blood.

→ Transport of Hormones :- 

The endocrine gland secrete their hormones directly into the blood, which carries them to their target organs.

→ Transport of Waste products :- 

Plasma carries nitrogenous waste namely; urea, uric acid, etc. from the liver and other tissues to the kidney for removal.

→ Regulation of water balance :- 

Plasma regulates the water balance of the body, as it supplies water to the tissues and receives the excess water formed in metabloic process.

→ Regulation of pH :- 

Plasma helps to regulate the pH of the body fluids.

→ Regulation of the body temperature :-

Plasma carried heat from the heat producing tissues such as muscles and glands to others.

→ Platelets :- 

Platelets play a role in blood clotting.

→ WBCs (white blood corpuscles) :-

The WBCs act as the soilders, scavengers and builder of the body.
_________________________________