Muscular organ that pumps blood through the circulatory system
Heart rate
Number of beats of the heart per minute
Adrenaline
A hormone that can increase heart rate
Coronary circulation
Blood is circulated through the cardiac muscle of the heart
Cardiac muscle
The muscle tissue of the heart
Aorta
Main artery that carries oxygenated blood from the heart to the body
Vena cava
Large vein carrying deoxygenated blood to the heart
Right atrium
Upper right chamber of the heart that receives deoxygenated blood from the vena cava
Left atrium
Upper left chamber of the heart that receives oxygenated blood from the pulmonary veins
Right ventricle
Lower right chamber of the heart that receives blood from the right atrium and forces it into the pulmonary artery
Left ventricle
Lower left chamber of the heart that receives blood from the left atrium and contracts to force it into the aorta
Bicuspid valve
An atrioventricular valve between the left atrium and the left ventricle which prevents backflow.
Septum
Wall of tissue that separates the left and right side of the heart
Coronary heart disease
A narrowing or blockage of the coronary arteries that supply blood and oxygen to the heart
Tricuspid valve
An atrioventricular valve, being situated between the right atrium and the right ventricle. Prevents backflow of blood.
Semilunar valves
Pulmonary and aortic valves located between the right ventricle and the pulmonary artery and between the left ventricle and the aorta. Prevents backflow of blood.
Hepatic vein
The vein that collects blood from the liver and returns it to the heart
Hepatic artery
Supplies oxygenated blood to the liver
Hepatic portal vein
A vein connecting the capillary bed of the intestines with the capillary bed of the liver.
Renal vein
Blood vessel that carries blood away from the kidney and toward the heart
Renal artery
Blood vessel that carries blood to the kidney
Vein
Blood vessel carrying blood towards the heart
Artery
Blood vessel carrying blood away from the heart
Capillary
A tiny blood vessel (one cell thick) where substances are exchanged between the blood and the body cells.
Pulmonary circulation
Circulation of blood between the heart and the lungs.