The heart pumps blood around the body and has four chambers. The atria are at the top, and the ventricles are at the bottom. Typically, electrical signals travel from the atria to the ventricles ...

Each side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles ...

The heart has two upper chambers, called atria, which move blood to the lower chambers, called ventricles, which then pump the blood to the lungs and the rest of the body. Heartbeats are ...

Each side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles ...