Capillaries are tiny blood vessels where the smallest arteries meet the smallest veins and where the blood exchanges food and oxygen for waste products. Veins, which are also blood vessels, return depleted blood to the h... More »

Capillaries are extremely small blood vessels responsible for the delivery of essential nutrients directly to tissues throughout the body. They also help the body circulate blood and remove waste from its organs. More »

Arterioles facilitate and manage the flow of blood between the oxygen-rich arterial component of the circulatory system and the oxygen-poor venous loop. describes arterioles as the smallest branches of an ... More »

The capillaries are responsible for the interchange of oxygen, carbon dioxide, water, nutrients and waste products between blood and surrounding tissues. The capillaries are the smallest of the blood vessels. More » Science Human Anatomy Blood

The blood in human body flows from the heart to the arteries which branch into arterioles and then smaller capillaries, which then merge to form venules that merge into larger veins that carry blood back to the heart. Th... More »

The smallest blood vessels in the human body are capillaries, which connect arteries and veins. Capillaries can be as small as 5 micrometers wide. The average adult body has about 10 billion capillaries. More »

Capillary density is a physiological measure that takes a cross section of muscle and counts the number of capillaries, or blood vessels, contained within. This measurement can be an indicator of overall health and is al... More »