Question

Q:5 answer in one word
1 what are veins​

Answer 1

Answer:

Any of the blood vessels that carry blood toward the heart from the body's cells, tissues, and organs. Veins are thin-walled and contain valves that prevent the backflow of blood. All veins except the pulmonary vein carry blood with low levels of oxygen.

Explanation:

I hope it help you

Answer 2

Explanation:

veins are the blood vessel that Carry blood towards the heart ...... most of the veins carry deoxygenated blood from tissue back to the heart