The<unk>  is one of four chambers (two atria and two<unk> s) in the human heart. It receives de-oxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the pulmonary valve.
It is triangular in form, and extends from the right atrium to near the apex of the heart.
Right ventricle
Left ventricle
Right atrium
Thoracic aorta
Coronary sinus
Aortic sinus
Pulmonary valve
Atrioventricular node