Answer:
Capillary beds: Capillary beds are the site of nutrient and oxygen delivery to tissues.
Explanation:
Capillary beds are part of a bigger system in the human body: circulatory system, whicis also called vascular or cardiovascular system. It is connected with other systems such as the respiratory and the excretory system.
Capillary beds don't have a total cross-sectional area much smaller than the total cross-sectional area of major arterie and they don't join of arteries and veins. Actually, the capillaries are the ones that connect arteries and veins.
Capillary beds are the site of nutrient and oxygen delivery to tissues. A capillary bed is a network full of capillaries. In this space there is a fluid exchange. And the more metabolic activity a cell has, the more capillaries are needed for a right and sufficient supply.
