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Glossary |
One of the two upper chambers in your heart. (One upper chamber is called an atrium. Both upper chambers together are called the atria.) When blood flows into your heart from the body or lungs, it always flows into either the right or left atrium.
The force of your blood pushing against the walls of your arteries. The force is stronger when your heart contracts, and weaker when your heart relaxes.
A chamber is one of the four sections inside your heart. The four chambers are the right atrium, right ventricle, left atrium, and left ventricle. Each chamber has valves that control blood flow in and out.
The two lower chambers in your heart. The ventricles are the pumping chambers of your heart. When blood leaves your heart, it is always pumped out from the ventricles.