Podcast
Questions and Answers
What is the main function of the ribs in the thoracic skeleton?
What is the main function of the ribs in the thoracic skeleton?
What are the three parts of the sternum?
What are the three parts of the sternum?
How many pairs of ribs are there in the thoracic skeleton?
How many pairs of ribs are there in the thoracic skeleton?
What is the location of the sternum?
What is the location of the sternum?
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What is the name of the joint between the head of the rib and the vertebra?
What is the name of the joint between the head of the rib and the vertebra?
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What are the anatomical spaces between every two adjacent ribs?
What are the anatomical spaces between every two adjacent ribs?
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What is the name of the process that ribs 11 and 12 end in?
What is the name of the process that ribs 11 and 12 end in?
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Study Notes
Thoracic Skeleton
- The thoracic skeleton consists of the sternum, 12 pairs of ribs, 12 thoracic vertebrae, and interconnecting joints.
Sternum
- The sternum is a flat bone located at the anterior aspect of the thorax, lying in the midline of the chest.
- The sternum is divided into three parts: the manubrium, body, and xiphoid process.
Ribs
- There are 12 pairs of ribs that form the protective 'cage' of the thorax.
- Ribs articulate with the vertebral column posteriorly and terminate anteriorly as cartilage (costal cartilage).
- Ribs have two roles: protecting internal thoracic organs and facilitating ventilation by moving during chest expansion to enable lung inflation.
- Each rib forms two joints: costotransverse joint and costovertebral joint.
Rib Attachments
- Ribs 1-7 attach to the sternum.
- Ribs 8-10 attach to the costal cartilages.
- Ribs 11 and 12 do not have an anterior attachment and end in the abdominal musculature.
Intercostal Spaces
- There are 11 intercostal spaces, each containing intercostal muscles (external, internal, and innermost) and the intercostal neurovascular bundle.
- The intercostal neurovascular bundle consists of the intercostal vein, artery, and nerve.
Thoracic Organs
- The thorax contains the heart, lungs, thymus, trachea, and esophagus.
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Description
Learn about the thoracic skeleton, its components, and the main joints involved. This lecture covers the sternum, ribs, thoracic vertebrae, and intercostal spaces.
