the two upper chambers of the heart.
The two lower chambers of the heart. These muscular chambers push the blood out of your heart.
veins that carry oxygenated blood from the lungs to the heart.
Tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body.
inferior vena cava
The large vein that collects blood from the lower part of the body.
superior vena cava
The large vein that collects blood from the upper part of the body.
the only arteries that carry deoxygenated blood. They carry blood from the right ventricle to the lungs.
The heart muscle. The thickest layer of the heart.
The special fibrous sac that hold the heart in place.
The thin smooth tissue that lines the inside of the heart.
The thick muscular wall between the two ventricles.
The thin wall between the two atria.
Two of the four valves found in the heart. These valves are placed between the artrium and the ventricle.
diastolic blood pressure
the second number in a person's blood pressure. Measures the pressure against the arterial wall when the ventricles are relaxed.
systolic blood pressure
The first number in a person's blood pressure. Measures the pressure against the arterial walls when the ventricles contract.
The cluster of cells inside the heart that cause it to beat on its own.
A measurement of the force of the blood pushing against the artery walls.
The momentary stretching of arteries caused by the rush of blood pushed out of the heart with each beat.
"Doors" that open and close between the artium and ventricles.
Two of the four valves found in the heart. Half moon shaped. They keep the blood from flowing backwards when the heart relaxes.