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Questions and Answers
Which vertebrae have full costal facets? (Select all that apply)
Which vertebrae have full costal facets? (Select all that apply)
What kind of joint is formed by the articulation of a rib with two demi-facets?
What kind of joint is formed by the articulation of a rib with two demi-facets?
Which of the following statements about demi-facets is TRUE? (Select all that apply)
Which of the following statements about demi-facets is TRUE? (Select all that apply)
The articulation of a rib with a full costal facet on the vertebral body results in what type of joint?
The articulation of a rib with a full costal facet on the vertebral body results in what type of joint?
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Which of the following statements BEST describes the structural impact of demi-facets?
Which of the following statements BEST describes the structural impact of demi-facets?
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What is NOT true about the xiphoid process?
What is NOT true about the xiphoid process?
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Which ribs attach to the sternum via rib 7's costal cartilage?
Which ribs attach to the sternum via rib 7's costal cartilage?
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What is the function of the bony thorax?
What is the function of the bony thorax?
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Which of the following bony landmarks is NOT found on the sternum?
Which of the following bony landmarks is NOT found on the sternum?
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What is the specific bony structure that articulates with the clavicle?
What is the specific bony structure that articulates with the clavicle?
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Ribs 11 and 12 are classified as:
Ribs 11 and 12 are classified as:
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What is the function of the costal cartilages?
What is the function of the costal cartilages?
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Which statement BEST describes the relationship between the bony thorax and pregnancy?
Which statement BEST describes the relationship between the bony thorax and pregnancy?
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Study Notes
Bony Thorax
- The bony thorax protects thoracic organs and facilitates respiration.
- It supports the shoulder girdle and upper limbs.
- It provides attachment sites for muscles.
Components of the Bony Thorax
- Ribs: Located laterally.
- Thoracic vertebrae: Located posteriorly.
- Sternum and costal cartilage: Located anteriorly.
Sternum
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Comprised of 3 sections:
- Manubrium: Articulates with the clavicles.
- Body: Articulates with costal cartilages of ribs 2-7.
- Xiphoid process: Ossifies around age 40.
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Key landmarks include the jugular notch, sternal angle, and xiphisternal junction.
Ribs
- All ribs attach to the vertebral column posteriorly.
- 12 pairs of ribs, and 12 thoracic vertebrae.
- True ribs (ribs 1-7): Attach to the sternum via costal cartilage.
- False ribs (ribs 8-12): Attach to the sternum via rib 7's cartilage.
- Floating ribs (ribs 11-12): Do not attach to the sternum.
Rib Structure and Articulation
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Ribs have a head, neck, tubercle, and shaft.
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The head of a rib articulates with vertebral bodies.
- Vertebrae T2-T9 have two demifacets (superior and inferior)
- Vertebrae T1, T10, T11, and T12 have complete costal facets for ribs 1 and 10-12.
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Full costal facets provide more stability, while demi-costal facets allow for greater mobility and breathing.
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Demi-facets are located on T2-T9 vertebrae, allowing articulation with one rib and one adjacent vertebrae.
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Description
Test your knowledge on the bony thorax, including its functions and components. Learn about the ribs, sternum, and their articulations. This quiz covers essential landmarks and classifications of ribs.
