A small blood vessel that connects arterioles and venules, facilitating the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and surrounding tissues.

The capillary network in the lungs is essential for efficient gas exchange.

A tube with a very small internal diameter.

The scientist used a capillary tube to transfer the liquid sample.

capillaryadjective

Relating to or resembling a hair; fine and slender.

The capillary tubes in the laboratory were used for precise measurements.

Pertaining to capillaries, the tiny blood vessels in the body.

The capillary action in the plant's roots helps it absorb water efficiently.