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 ...

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 ...

Taking a magnifying mirror to the face is never a fully positive experience—especially when you sit under the fluorescent bathroom lights in hopes of a satisfying extraction, and instead come across ...

The kidneys contain millions of microscopic blood vessels known as peritubular capillaries. These vessels recapture helpful nutrients like glucose and minerals and return them to your bloodstream for ...