Question

What are the functions of different types of blood vessels

Answer 1

The different types of blood vessels are arteries, capillaries and vein

1. An artery is a vessel which carries blood away from the heart to the organ

2.A vein is a vessel which conveys the blood away from an organ towards the heart

3. FUNCTIONS OF CAPILLARIES-

 (a) To allow outward diffusion of oxygen into the intercellular fluid and from there into the tissue cells

 (b) To allow inward diffusion of carbon dioxide from the intercellular fluid

 (c) To allow inward and outward diffusion of substances like glucose,amino acids, urea , harmonies,etc

 (d) To allow leucocytes (WBCs) to squeeze out of the capillary walls by means of ameboid movement

Answer 2

1) Arteries➷

• They have no valves

• They are thick walled

• They carry oxygenated blood from the heart except pulmonary Artery.

2) Veins➷

• They have valves

• They are thin walled

• They carry deoxygenated blood towards the heart.

3) Capillaries➷

• They are very fine

• They do not have valves

• They have mixed blood

• They are found in tissues