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Right ventricle
The chamber of the heart responsible for pumping deoxygenated blood to the lungs.
Left ventricle
The chamber of the heart responsible for pumping oxygenated blood to the rest of the
body.
Pulmonary circulation
The circulation of blood between the heart and the lungs.
Atrium
One of the two upper chambers of the heart that receives blood from the veins.
Ventricle
One of the two lower chambers of the heart that pumps blood out to the arteries.
Mitral valve
A valve located between the left atrium and the left ventricle that prevents backflow of
blood.
Pulmonary valve
A valve located between the right ventricle and the pulmonary artery that prevents
backflow.
Backflow
The reverse flow of blood, which may occur if valves are not functioning properly.
Sympathetic input
Nervous system signals that increase heart rate and strength of contractions.
Parasympathetic input
Nervous system signals that decrease heart rate.
Systemic circulation
The circulation of blood between the heart and the rest of the body.
Resistance
Opposition to blood flow in blood vessels.
Aorta
The largest artery in the body, carrying oxygenated blood from the heart to the rest of
the body.
Myocardial infarction
A heart attack, resulting from the death of heart muscle tissue.
Edema
Abnormal accumulation of fluid, often causing swelling, typically in the extremities.
Coronary arteries
Blood vessels that supply the heart muscle with oxygen and nutrients.
Vena cava
Large veins that return deoxygenated blood from the body to the right atrium.
Pulmonary artery
The vessel that carries deoxygenated blood from the right ventricle to the lungs.
Pulmonary vein