The blood flows around the body in blood vessels (tubes) called arteries, veins and capillaries. This is the circulatory system. The heart pumps the blood through the circulatory system. Arteries ...
With each heartbeat, blood courses through your body. Some traverse arteries from the lungs back to the heart, and some navigate through capillaries in the thinnest layers of your eyelid, almost ...
Noticing your hands or fingers turning bluish in colour can be quite unsettling. This condition, known as peripheral cyanosis, occurs when oxygen-rich blood doesn’t reach your hands and feet ...