Question

1.........
body back to the heart.
.are blood vessels that take deoxygenated blood from other parts of the
2. Veins have.......
..... that prevent the blood from flowing backwards.
3. The ...
...........in the heart have thinner walls than the............​

Answer 1

Answer:

HELLO DEAR!!!

have a nice day

Explanation:

BIOLOGY:

1. Veins
2. Valves
3. Veins ,Arteries

hope my answer helps you

thank my answer ♥️

Answer 2

Answer:

i dont know know know know know know no no no no no

Explanation:

idont know ask to anybody