NEET PG DENTAL EXAM

Detailed explanation-1: -For example, blood flow is slow at the capillaries because of the high total cross-sectional area, which allows for proper nutrient exchange. Blood flow is pressure gradient over resistance or the difference between mean arterial pressure and right atrial pressure over peripheral vascular resistance.

Detailed explanation-2: -Capillaries are the fine networks that help in connecting the arteries to the veins. They are very thin and tubular and blood flows with the minimum velocity inside the capillaries. Thus, low velocity provides enough time for the exchange of gases (oxygen and carbon dioxide), nutrients, and waste products.

Detailed explanation-3: -Blood pressure tends to be the greatest near the heart, and decreases as blood flows to the capillaries. The pressure is greatest at the aorta and gradually decreases as blood moves from the aorta to large arteries, smaller arteries, and capillaries.