QS Study

Classify blood vessel on the Physiological point of view

Blood is carried through the body via blood vessels. Blood vessels are the channels or conduits through which blood is distributed to body tissues. These make up the body’s internal ‘road’ network linking the heart to all the organs and tissues of the body that the blood needs to reach.

Physiologically blood vessels are 5 types-

  1. Conducting vessel
  2. Windkesel (distribution vessel)
  3. Resistance vessel
  4. Exchange vessel
  5. Capacitance vessel / Reservoir vessels.

Fig: blood vessel

Conducting vessel: These are well-formed vessel arising from the heart. e.g., Large arteries like aorta, Superior flaw vena cava etc.

Distribution vessel: Medium sized vessels containing conspicuous muscular component carry blood to different organs from the heart. e.g., Femoral artery, Bracheal artery etc.

Resistance vessel: The vessels which control blood flow by exerting resistance on the vessel wall, e.g., Arterioles, terminal arterioles.

Exchange vessel: The vessel which is related to the exchange of gases, nutrients, vitamins and hormones between blood and body fluid, e.g., capillaries etc.

Capacitance vessels/reservoir vessels: The vessels contain a large volume of blood. e.g. Veins and modes.

The volume of blood distribution in dittoing parts of the circulation-

Fig: volume of blood distribution

Cross-Sectional Areas-