Sternum pictures Study-tutorial Practical: 1. Living anatomy 2. Museum
Sternum is the breast bone. It is found only in land animals.
It is also called mesosternum. The junction of the sternum with
the manubrium is called the manubriosternal junction forming the
Sternum is divided into four segments called
Features of sternum
The sternum is provided with three important parts
Ligaments and joints of sternum
BORDERS: Sternum has
two lateral borders. The borders carry the facets for articulation with 2nd
to 7th costal cartilages.
manubrium has also two lateral borders and a superior border which carries the
clavicular notch for articulating with clavicle. There is a jugular notch
between the heads of the clavicles. The inferior border of the manubrium
articulates with the sternal upper border to form the manubrosternal junction- a
junction marked by the landmark called the sternal angle of Louis. It carries
the demifacet for the 2nd costal cartilage and is a landmark for
recognizing this junction and therefore for identifying intercostal aspects and
numbers of ribs on a living or other subjects.
SURFACES: Sternum has three surfaces. One anterior and another posterior and superior surfaces. The superior surface articulates with the manubrium.
© Electronic School of Medicine
Creator: Oluwole Ogunranti