Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...

Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them. They help to connect your arteries and veins in addition to facilitating the exchange of ...

Both arteries and veins are types of blood vessels in the cardiovascular system. An artery carries blood away from the heart, and a vein carries blood back to the heart. Blood vessels are essential ...

Blood is pumped from the heart in the arteries. It is returned to the heart in the veins. The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the ...

Capillaries allow exchange of substances with body tissues through their thin walls. As blood travels at high pressure in the arteries towards the capillaries, pressure filtration occurs which results ...

Arteries are blood vessels. Most carry oxygen-rich blood from the heart to various organs and tissues. Arteries are a part of the circulatory system, along with the heart and other blood vessels. The ...