Question

blood is pushed out to the body by the muscles of the... lungs. veins. heart. arteries.

Explanation:

The heart is a muscular organ. Its contractions pump blood out to the body through the arteries. Lungs are for gas - exchange, veins carry blood back to the heart, and arteries are vessels that carry blood away from the heart, but it's the heart's muscles that do the pumping.

Answer:

C. heart