Human Circulatory System

Blood vessels form the complete circulatory pathway through which blood travels. Red blood cells, platelets, and plasma are components carried WITHIN the blood, but the vessels themselves (arteries, veins, capillaries) are the infrastructure that allows circulation to all body tissues.

Clotting (or coagulation) is the process where blood changes from liquid to solid form to stop bleeding. This process involves platelets and clotting proteins that work together to form a clot at the site of injury. Supporting, collecting, and resisting are not terms used to describe blood solidification.

Blood vessels leading into Bowman's capsule are called afferent arterioles and discharge blood into an efferent arteriole. Because the calibre of the efferent arteriole is smaller than that of the afferent arteriole, a resistance to blood flow out of the golmeruli is developed. As a result, a golmerular hydrostatic pressure builds up in the glomerulus. 

The phenomenon of squeezing out lymphocytes from capillaries is known as diapedesis.

It supplies blood to the heart wall.

Phrenic artery supplies blood to diaphragm.

Circulation of blood between heart and lungs is called pulmonary circulation.

Mesenteric arteries supply blood to the small intestine, duodenal wall and pancreas.

Tissue fluid that enters into the lymph capillaries is called lymph.

The inferior vena cava (or IVC), also known as the posterior vena cava is the large vein that carries deoxygenated blood from the lower half of the body into the heart. They are the longest vein.

Spleen is called the blood bank because it acts as a reservoir of blood and whenever there is a blood loss, it releases the reserve blood into the circulation.

The Right Atrium is the chamber of the heart that receives deoxygenated blood from the body through the superior and inferior vena cava. From the right atrium, the blood flows into the right ventricle, which then pumps it to the lungs for oxygenation. The left side of the heart deals exclusively with oxygenated blood returning from the lungs.

The right auricle (atrium) receives deoxygenated blood from the body's tissues. This blood is delivered via the superior and inferior vena cava. The aorta, in contrast, carries oxygenated blood away from the left ventricle to the rest of the body.