Question

Explain the structure and function of human blood

Answer 1

Blood is a red coloured fluid. It is composed of mainly two components -

A] Plasma

B] Blood cells



A] $\huge{\underline{\underline{\red{\bf{Plasma}}}}}$ :-

1] Plasma is pale yellow, clear and slightly alkaline fluid. It contains 90 - 92% water, 6 - 8% proteins and 1 - 2% inorganic slats and other components.

2] $\underline{Albumin}$ : Distributes the water all over the body.

3] $\underline{Globulins}$ : Protection.

4] $\underline{Fibrinogen\:and\:prothrombin}$ help in blood clotting process.

5] $\underline{Inorganic\:ions}$ - Ca, Na, K - Control the function of muscles
and nerves.



$\huge{\underline{\underline{\red{\bf{Blood\:cells}}}}}$ :-

1] $\underline{Red\:Blood\:Corpuscles}$ :

i] Small, circular, enucleated cells. These cells appear red due to hemoglobin.

ii] 50 - 60 lakh RBC's are present in each cubin millimeter of blood.

2] $\underline{White\:Blood\:Cells}$ :

i] These are large, nucleated and colorless cells. 5000 - 10000 WBC's are present per mm³ of blood.

ii] These cells attack pathogens entering our body. They protect us from the microbial diseases.

3] $\underline{Platelets}$ :

i] These are extremely small and disc - shaped.

ii] 2.5 - 4 lakh platelets are present in per mm³ of blood.

iii] Platelets participate in blood clotting process.

Answer 2

Answer:

It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. ... bringing waste products to the kidneys and liver, which filter and clean the blood.

Below are 8 important facts about blood.

• Blood Is Fluid Connective Tissue. ...
• Blood Provides the Body's Cells with Oxygen and Removes Carbon Dioxide. ...
• Blood Transports Nutrients and Hormones. ...
• Blood Regulates Body Temperature. ...
• Platelets Clot Blood at Sites of Injury. ...
• Blood Brings Waste Products to the Kidneys and Liver.