b) State what ribs are
Answers
Answer:
The ribs are curved, flat bones which form the majority of the thoracic cage. They are extremely light, but highly resilient; contributing to their role in protecting the internal thoracic organs. There are twelve pairs of ribs, all of which articulate with the vertebral column.
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Answer:
The ribs are the bony framework of the thoracic cavity.
The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration.[1]
There are twelve pairs of ribs.
Each rib articulates posteriorly with two thoracic vertebrae by the costovertebral joint. An exception to this rule is that the first rib articulates with the first thoracic vertebra only.
According to their attachment to the sternum, the ribs are classified into 3 groups: true, false, and floating ribs.
The true ribs are the ribs that directly articulate with the sternum with their costal cartilages - ribs 1-7. They articulate with the sternum by the sternocostal joints. The first rib is an exception to that rule; it is a synarthrosis and the first rib could uniquely articulate with the clavicle by the costoclavicular joint
The false ribs (8,9,10) are the ribs that indirectly articulate with the sternum, as their costal cartilages connect with the seventh costal cartilag by the costochondral joint.
The floating ribs (11,12) do not articulate with the sternum at all (distal two ribs).[2]
Structure and Function
Rib.png
Typically, the ribs have the following anatomical components:
Head with two articular facets
Tubercle
Neck
Shaft
Costal groove
Most of the ribs are typical ribs ie they have all these features. The atypica
