| A | B |
|---|
| atrium | two upper chambers of the hear that contract at the same time during a heartbeat |
| ventricle | two lower chambers of the heart that contract at the same time durning a heartbeat |
| coronary circulation | the flow of blood to and from the tissue of the heart |
| cardiac | refers to the heart which is also known as coronary |
| pulmonary circulation | flow of blood through the heart to the lungs and back to the heart |
| pulmonary | refers to the lungs |
| systemic circulation | largest part of the circulatory system.Rich oxygenated blood flows to all the organs and body tissues, except the heart and lungs, and oxygen-poor blood is returned to the heart |
| artery | blood vessels that carries rich oxygenated blood away from the heart |
| vein | blood vessel that carry blood to the heart and have one-way valves that keep blood moving towards the heart |
| capillary | microscopic blood vessels that connect arteries and veins, they have walls that are one cell thick. Nutrients and oxygen diffuse into the cell and carbon dioxide and wastes diffuse out |
| aorta | the largest artery in your body |
| pulmonary artery | the only artery that carries blood that is high in carbon dioxide |
| pulmonary vein | the only vein that carries oygen-rich blood |
| superior vena cava | a major vein that returns blood from your head and neck |
| inferior vena cava | a major vein that returns blood from your abdomen and lower body |
| blood pressure | the force of the blood on the walls of the blood vessels |
| systolic | the measure of the pressure caused when the ventricles contract and blood is pushed out of the heart |
| diastolic | occurs when the ventricles fill with blood just before they contract again |
| atherosclerosis | when fatty deposits build up on artery walls and if the coronary artery is blocked, a heart attack can occur |
| hypertension | high blood pressure |
| heart failure | when the heart cannot pump blood efficiently |
