While cells in blood vessels and in most other lymphatic vessels are carried along by a flow of fluid, virtually no flow is present in lymphatic capillaries. Consequently, cells in these capillary ...

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 ...

Many diseases arise from abnormalities in our capillaries, tiny exquisitely branching blood vessel networks that play a critical role in tissue health. Researchers have learned a lot about the ...

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 ...

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 ...