Heart: four-chambered, egg-shaped muscular organ. The central apparatus of blood circulation.
Aortic valve: tissue that prevent blood from flowing backwards in the left ventricle.
Opening of the coronary artery: place where the coronary artery is attached to the heart.
Aorta: principal artery.
Opening of the pulmonary veins: place where the pulmonary veins are attached to the heart.
Left pulmonary arteries: vessels carrying blood from the heart to the left lung.
Left pulmonary veins: vessels carrying blood from the left lung to the heart.
Left atrium: upper left chamber of the heart.
Mitral valve (bicuspid valve): tissue that prevents blood from flowing backward from the left ventricle to the left atrium.
Entry of the aorta: place where the aorta is attached to the heart.
Left ventricle: lower left chamber of the heart.
Interventricular septum: partition separating the ventricles.
Right ventricle: lower right chamber of the heart.
Inferior vena cava: vessel that returns unoxygenated blood to the heart from the lower part of the body.
Triscupid valve: tissue that prevents blood from flowing backward from the right ventricle to the right atrium.
Opening of the coronary vein: place where the coronary vein attaches to the heart.
Right atrium: upper right chamber of the heart.
Semi-lunar pulmonary valve: tissue that prevents the blood from flowing backwards in the right ventricle.
Right pulmonary veins: vessels carrying blood from the right lung to the heart.
Superior vena cava: vessel that returns unoxygenated blood to the heart from the upper part of the body.
Right pulmonary arteries: vessels carrying blood from the heart to the right lung.