arteriole
/ɑrˈtɪriˌoʊl/
noun
- A very small blood vessel that branches from an artery and leads into capillaries.
- The arteriole connects the larger artery to the network of tiny capillaries.
- When you exercise, your arterioles widen to let more blood reach your muscles.
- Each arteriole helps regulate blood flow to different parts of the body.
Synonyms