The human circulatory system consists of arteries, veins, and capillaries. The capillaries are the thin-walled vessels that connect arteries and veins and allow for the exchange of materials between blood and tissue fluid.
capillaries
Arteries carry blood away from the hart, they have the highest blood pressure and amount of oxygen. (except for pulmonary arteries) Capillaries carry blood from arteries to veins. They are a single cell wide and exchange chemicals with nearby tissue. Veins carry blood towards the heart, and have the lowest amount of oxygen. (except for pulmonary veins)
Gas exchange primarily occurs in the capillaries, not in arteries or veins. Arteries carry oxygen-rich blood away from the heart to tissues, while veins return oxygen-poor blood back to the heart. The capillaries, which are small blood vessels that connect arteries and veins, facilitate the exchange of oxygen and carbon dioxide between the blood and surrounding tissues. Therefore, gas exchange does not take place directly in arteries or veins.
Capillaries
Pulmonary arteries
Metabolites exchange by diffusion with tissue cells at the capillaries in the circulatory system. Capillaries are the smallest blood vessels where the exchange of nutrients, oxygen, and waste products occurs between the blood and the surrounding tissue cells.
1. The main type of blood vessels in the body are: Arteries, its arterial blood is pumped from the heart through a series of large distribution vessel. Arterioles is arteries that is into subdivide into vessels that become progressively smaller and finally become tiny. Capillaries is arterioles that control the flow into microscopic exchange vessels . Venues is the so called capillary beds, the exchange of nutrients and respiratory gases occurs between the blood and the tissue fluid around the cells.
Arteries take blood from the heart to the body. Capillaries are tiny blood vessels that enable substance exchange between the blood and the body tissues. Veins carry blood back to the heart.
Arteries. AORTA carry blood from the heart {left ventricle} to the tissue.
Arteries carry oxygenated blood to the heart while blood exchange is done in the capillaries
Supply blood to the heart tissue.