Question

____________ are used to join veins and arteries .




capillaries

heart

lungs

kidney

​

Answer 1

Answer:

CAPILLARIES

Explanation:

Capillaries are the smallest and most numerous of the blood vessels. They connect between the arteries (which carry blood away from the heart) and the veins (which return blood to the heart). The primary function of capillaries is the exchanging of materials, like oxygen, between the blood and tissue cells.

Answer 2

capillaries is the answer