When the heart is working inside the body, the job of the atria is to A. Increase the blood pressure
B. Regulate the heartbeat
C. Suck blood from the incoming veins
D. Fill the Ventricles

D. Fill the ventricles.

Explanation:

The medical definition is "an anatomical cavity or passage especially : a chamber of the heart that receives blood from the veins and forces it into a ventricle or ventricles."

Hello There!!

Explanation:

The answer is D. Fill the Ventricles.

hope this helps,have a great day!!

~Pinky~

answer; //the above statement is (false);

yes it is weird but true