Blood is pumped by the heart and transported throughout the body through blood vessels

Blood exchanges substances at tissue cells and then returns to the heart

Blood is pumped from the heart through arteries, capillaries, and veins before returning to the heart

Blood is pumped from the heart through the pulmonary arteries, pulmonary capillaries, and pulmonary veins before returning to the heart

Regulation of heart beating speed and myocardial contractility through nerve impulses

Regulation of vasoconstriction and relaxation through hormones and local metabolites

Vascular endothelial damage, lipid deposition, and atheromatous plaque formation

Blood clots in the veins, forming a thrombus

The number of red blood cells in the blood decreases, resulting in insufficient oxygen supply to tissue cells;