Musculophrenic artery
Encyclopedia
The musculophrenic artery arises from the internal thoracic artery
, directed obliquely downward and laterally, behind the cartilages of the false ribs
; it perforates the diaphragm at the eighth or ninth costal cartilage, and ends, considerably reduced in size, opposite the last intercostal space
.
It gives off intercostal branches to the seventh, eighth, and ninth intercostal spaces; these diminish in size as the spaces decrease in length, and are distributed in a manner precisely similar to the intercostal arteries
from the internal thoracic artery
.
The musculophrenic artery also gives branches to the lower part of the pericardium
, and others which run backward to the diaphragm, and downward to the abdominal muscles.
: Branches of the Internal Thoracic Artery"
Internal thoracic artery
In human anatomy, the internal thoracic artery , previously known as the internal mammary artery , is an artery that supplies the anterior chest wall and the breasts...
, directed obliquely downward and laterally, behind the cartilages of the false ribs
False ribs
The false ribs, are the five sets of ribs below the top seven true ribs. A rib is considered to be "false" if it has no direct attachment to the sternum, also known as the breast bone...
; it perforates the diaphragm at the eighth or ninth costal cartilage, and ends, considerably reduced in size, opposite the last intercostal space
Intercostal space
The intercostal space is the space between two ribs . Since there are 12 ribs on each side, there are 11 intercostal spaces, each numbered for the rib superior to it.-Structures in intercostal space:* several kinds of intercostal muscle...
.
It gives off intercostal branches to the seventh, eighth, and ninth intercostal spaces; these diminish in size as the spaces decrease in length, and are distributed in a manner precisely similar to the intercostal arteries
Intercostal arteries
The intercostal arteries are a group of arteries that supply the area between the ribs , called the intercostal space.* Highest intercostal artery - first and second intercostal spaces...
from the internal thoracic artery
Internal thoracic artery
In human anatomy, the internal thoracic artery , previously known as the internal mammary artery , is an artery that supplies the anterior chest wall and the breasts...
.
The musculophrenic artery also gives branches to the lower part of the pericardium
Pericardium
The pericardium is a double-walled sac that contains the heart and the roots of the great vessels.-Layers:...
, and others which run backward to the diaphragm, and downward to the abdominal muscles.
External links
- "Thoracic wallThoracic wall
The thoracic wall is the boundary of the thoracic cavity.The bony portion is known as the thoracic cage. However, the wall also includes muscle, skin, and fascia....
: Branches of the Internal Thoracic Artery"