||It has been suggested that this article be merged into Ventricle. (Discuss) Proposed since July 2014.|
Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow.
Interior of right side of heart.
|Artery||right marginal branch of right coronary artery|
|Precursor||primitive ventricle, bulbus cordis|
The right ventricle is one of four chambers (two atria and two ventricles) in the human heart. It receives deoxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the semilunar pulmonary valve and pulmonary artery.
It is triangular in form, and extends from the right atrium to near the apex of the heart.
Its upper front surface is circled and convex, and forms much of the sternocostal surface of the heart. Its under surface is flattened, forming part of the diaphragmatic surface of the heart that rests upon the diaphragm.
Its posterior wall is formed by the ventricular septum, which bulges into the right ventricle, so that a transverse section of the cavity presents a semilunar outline.
A tendinous band, called the tendon of the conus arteriosus, extends upward from the right atrioventricular fibrous ring and connects the posterior surface of the conus arteriosus to the aorta.
The left ventricular wall is three times the thickness of the right ventricle wall. The right ventricle wall is thickest at the base and thins towards the apex.
The cavity equals in size that of the left ventricle, and contains roughly 85 millilitres (3 imp fl oz; 3 US fl oz) in a normal adult.
- Anatomy photo:20:05-0102 at the SUNY Downstate Medical Center