Ribs- Skeletal System

Body

middle of sternum, protection and mucle attachment

False Ribs

In humans there are normally 12 pairs of ribs. The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs. The 8th, 9th, and 10th pairs— false ribs—do not join the sternum directly but are connected to the 7th rib by cartilage.

True Ribs

a rib that is attached directly to the breastbone.

Xiphoid process

carilage, bottom of sternum---small cartilaginous process (extension) of the lower (inferior) part of the sternum, which is usually ossified in the adult human. It may also be referred to as the ensiform process.

manubrium

the broad upper part of the sternum of mammals, with which the clavicles and first ribs articulate; protection and muscle attachment

costal cartilage

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.

Floating Ribs

The term "floating rib" is most often used to refer to a specific set or sets of ribs that are located at the very bottom of the rib cage. Most ribs in the rib cage attach to the spine at the back and the sternum, or breastplate, in the front. Some ribs, however, are only attached to the spine. ----------- refers to the two lowermost, the eleventh and twelfth, rib pairs; so-called because they are attached only to the vertebrae-and not to the sternum or cartilage of the sternum. These ribs are relatively small and delicate, and include a cartilaginous tip.