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Capillary (Noun)

A tube of small internal diameter; holds liquid by capillary action.

Nouns denoting man-made objects.

The narrow glass tube acted as a capillary, drawing the colored liquid upwards through capillary action.
A capillary is used in medical testing to collect a small sample of blood for analysis.
The scientist carefully inserted the capillary into the beaker, watching as the liquid rose up into the tube.
The tiny capillary tubes were used to separate and analyze the different components of the mixture.
In the lab, the researcher used a capillary to measure the precise volume of the liquid solution.

Any of the minute blood vessels connecting arterioles with venules.

Nouns denoting body parts.

The oxygen from the lungs enters the blood and then passes through the capillary network to be distributed to the cells of the body.
Capillary action occurs when fluid moves through the small capillary tubes or spaces in a substance, often without the need for external pressure.
Blood travels from the arterioles into the capillary where it exchanges oxygen and nutrients for waste products before continuing to the venule.
As the body temperature rose, the capillary walls began to expand, allowing more blood to flow and dissipate heat.
In a damaged area, new capillary growth can help to promote healing by providing a route for oxygen and nutrients to reach the affected cells.