1 / 12

The Skeletal System

The Skeletal System. The Thoracic Cage. Review of Axial Skeleton. Consists of the following: The skull The vertebral column The thoracic cage Auditory ossicles and hyoid. Thoracic Cage. Consists of: 12 pair of ribs sternum. Thoracic Cage. 12 pair of ribs Sternum

lysa
Télécharger la présentation

The Skeletal System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Skeletal System The Thoracic Cage

  2. Review of Axial Skeleton • Consists of the following: • The skull • The vertebral column • The thoracic cage • Auditory ossicles and hyoid

  3. Thoracic Cage • Consists of: • 12 pair of ribs • sternum

  4. Thoracic Cage • 12 pair of ribs • Sternum • Note the costal cartilages • Note which costal cartilages • articulate directly with the • sternum (#1-7)

  5. Thoracic Cage • True Ribs • Articulate posteriorly with all 12 thoracic vertebrae • Articulate anteriorly directly with sternum via costal cartilages • Ribs #1-7

  6. Thoracic Cage • Note costal cartilage of • ribs #1-7 articulates directly • with sternum. • Costal cartilage of ribs #8-10 • articulate with the costal • cartilage of the superior rib

  7. Thoracic Cage • False Ribs • Articulate posteriorly with all 12 thoracic vertebrae (same as true ribs) • Do not articulate with the sternum directly • Articulate with the costal cartilage just superior to it • Ribs #8-12 • Ribs 11 &12 are floating ribs. They don’t have an anterior articulation. They “float”.

  8. Sternum 3 fused bones

  9. Sternum • Consists of 3 bones that will ultimately fuse by around 40 yo. • Manubrium • Body • Xiphoid process

  10. Sternum • Manubrium articulates with • clavicle, rib #1 and rib #2. • Body articulates with ribs #2-7 • Sternal angle is the articulation • of the manubrium and the body • of the sternum. This is where • rib #2 shares an articulation • with both bones. It can be • palpated and rib #2 identified.

  11. Ribs • Have the following anatomical landmarks: • HEAD – HEAD OF RIB #6 ARTICULATES WITH DEMIFACETS ON THE BODIES OF VERTEBRAE #5&6 • NECK • TUBERCLE – SERVES AS ARTICULATION WITH TRANSVERSE PROCESS OF VERTEBRA WITH SAME #. • ANGLE • COSTAL GROOVE • BODY

  12. Ribs • Head of rib 9 articulates with bodies • of vertebrae 8 and 9. • Tubercle of rib 9 articulates • with transverse process • of vertebra 9

More Related