What is costal cartilage of the sternum?

The costal cartilages are bars of hyaline cartilage that serve to prolong the ribs forward and contribute to the elasticity of the walls of the thorax. Costal cartilage is only found at the anterior ends of the ribs, providing medial extension.

What is the function of costal cartilage?

The 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.

What are the 3 parts of the sternum?

The sternum is a partially T-shaped vertical bone that forms the anterior portion of the chest wall centrally. The sternum is divided anatomically into three segments: manubrium, body, and xiphoid process. The sternum connects the ribs via the costal cartilages forming the anterior rib cage.

What are facets in ribs?

A costal facet is a site of connection between a rib and a vertebra. The costal facets are located on the vertebrae that the rib articulates with. They are the superior costal facet, the inferior costal facet, and the transverse costal facet. Rib 1 only articulates with a transverse costal facet.

What is the costal?

Definition of costal pertaining to the ribs or the upper sides of the body: costal nerves. Botany, Zoology. pertaining to, involving, or situated near a costa.

Where are the costal cartilages?

The costal cartilages form part of the thoracic cage and anterior chest wall. There are ten costal cartilages bilaterally, one for each of the corresponding 1st to 10th ribs, and each of the first seven ribs forms one of the seven costochondral joints.

What is sternum made of?

The sternum is composed of highly vascular tissue, covered by a thin layer of compact bone which is thickest in the manubrium between the articular facets for the clavicles. The inferior sternopericardial ligament attaches the pericardium to the posterior xiphoid process.

What is a facet in anatomy?

Video Transcript. Facet joints are pairs of small joints in between the vertebrae in the back of the spine. These joints have opposing surfaces of cartilage, which limits friction between the bones.

How many costal facets are there?

Vertebrae T1, T10, T11, and T12 have complete costal facets on the bodies for ribs 1 and 10-12, which articulate on the vertebral bodies instead of between vertebrae. On the other hand, vertebrae T11 and T12 have no transverse costal facets.

Where is the costal?

The costal margin, also known as the costal arch, is the lower edge of the chest (thorax) formed by the bottom edge of the rib cage. Anterior surface of sternum and costal cartilages. (The costal margin forms a large upside-down V on the inferior border.)

What is costal surface mean?

The costal surface (facies costalis; external or thoracic surface) is smooth, convex, of considerable extent, and corresponds to the form of the cavity of the chest, being deeper behind than in front.