Question

How does the heart contribute to the circulation of blood through your system? A. it adds oxygen to the blood B. as the heart contracts, it pushes the blood through the vessels C. blood goes through your system continuously, and does not need to be pushed D. it simply acts as a passageway for the blood to travel through

Answer 1

Answer: I think B

Explanation: the heart pumps the blood and the blood vessels are near the heart, so that's why i think it's B

Answer 2

b

Step-by-step explanation: