soo i need help with is asap 1 why does blood flow much faster in arteries than veins and 2 why is it an advantage for blood to flow very slowly through capillaries
Answers
Explanation:
1. The blood pressure drops after the blood passes through the capillaries, and with a larger lumen, reducing the resistance to allow blood flow at a lower pressure, veins have a lower blood pressure. Hence, arterial blood pressure is higher than venous blood pressure.
2. Blood flow is slowest in the capillaries, which allows time for exchange of gases and nutrients. Resistance is a force that opposes the flow of a fluid. In blood vessels, most of the resistance is due to vessel diameter.
Answer:
1. Blood flows faster in arteries due to the fact that our heart pumps the blood directly into the arteries with a lot of pressure, whereas from veins blood reaches back to the heart.
2. While flowing through cappilaries blood distributes all the vitals to its surrounding by passive transportation that is diffusion, diffusion is a slow process hence it is advantageous for blood to flow slowly through capillaries.