Which blood vessels have the smallest diameter?
A. Capillaries
B. Arterioles
C. Venules
D. Lymphatic
Answers
The capillaries have the smallest diameter.
So the required answer is option - A. Capillaries.
What is blood?
Blood is a kind of connective tissue. It is fluid. These transport nutrients oxygen vitamins and hormones to the cells and remove nitrogenous wastes, carbon dioxide and other products from the cell.
What are blood vessels?
The blood flows through closed system of tubes called blood vessels.
The blood is formed of plasma and blood cells.
Functions of Blood :
• It transports oxygen ,nutrients, hormones etcetera to every part of the body.
• It collects waste from our every part of the body.
• It helps in thermoregulation ,water balance and maintenance of pH in body.
• Blood platelets help in the clotting of blood at the site where injury takes place.
Ans. A) Capillaries
Explanation: Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues. The diameter of capillary ranges from 5-10 micrometers. The diameter of arteriole is approx. 30 micrometer.