血管 (xuè guǎn): blood vessel

The doctor said my blood cholesterol is a bit high, and told me to watch my diet.

Exercise can promote blood circulation and is good for vascular health.

He had to have surgery because of blocked blood vessels.

Cold causes blood vessels to constrict, so keep warm in winter.

Smoking damages the inner walls of blood vessels and increases the risk of heart disease.

As we age, blood vessels gradually lose elasticity.