Right margin
Encyclopedia
The right margin of the heart
(right border of heart) is long, and is formed by the right atrium
above and the right ventricle
below.
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
(right border of heart) is long, and is formed by the right atrium
Right atrium
The right atrium is one of four chambers in the hearts of mammals and archosaurs...
above and the right ventricle
Right ventricle
The right ventricle is one of four chambers 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 pulmonary valve and pulmonary trunk....
below.
- The atrial portion is rounded and almost vertical; it is situated behind the third, fourth, and fifth right costal cartilagesCostal cartilagesThe costal cartilages are bars of hyaline cartilage which serve to prolong the ribs forward and contribute very materially to the elasticity of the walls of the thorax.-Differences from 1-12:...
about 1.25 cm. from the margin of the sternum.
- The ventricular portion, thin and sharp, is named the acute margin; it is nearly horizontal, and extends from the sternal end of the sixth right coastal cartilage to the apex of the heartApex of the heartThe apex of the heart is the lowest superficial part of the heart.It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura.-External anatomy:...
.