1. Thoracic Cage Notes

2. 7-8 The Thoracic Cage The Thoracic Cage The Rib Cage
__________________
Supports the thoracic cavity
Consists of:
________________
Ribs
___________________
The Rib Cage
Formed of ribs and sternum

3. Figure 7-23a The Thoracic Cage
Jugular notch T1
Clavicular articulation 1
Manubrium 2 3
Sternum
Body
True ribs
(ribs 1–7) 4
Xiphoid
process 5
Costal
cartilages 10
T11 6
T12 11 7
Vertebrochondral
ribs
(ribs 8–10) 12 8 9
False ribs
(ribs 8–12)
Floating ribs
(ribs 11–12)
An anterior view, showing the
costal cartilages and the sternum 3

4. Figure 7-23b The Thoracic Cage1 T1 1 2 T2 2 3 3 T3 4 T4 4 5 T5 5
True ribs
(ribs 1–7) 6 T6 6 7 T7 7 8 T8 8 T9 9 9
T10 10
T11 10
False ribs
(ribs 8–12) 11
T12 11 12 12 L1
A posterior view, showing the
articulations of the ribs and vertebrae 4

5. 7-8 The Thoracic Cage Functions of the Thoracic Cage
________________________
Heart, lungs, and thymus
Attaches muscles
For respiration
_________________
Of the pectoral girdle and the upper limbs

6. thoracic cavity is similar to the movement of a
Figure 7-24c The Ribs
Sternum
Ribs
The effect of rib
movement on the
thoracic cavity is similar
to the movement of a
bucket handle. Elevation
of curved ribs increases
the volume of the
thoracic cavity. 6

7. 7-8 The Thoracic Cage Ribs (Costae) _________________________
Extending from the thoracic vertebrae
Ribs are divided into two types
True ribs
______________

8. 7-8 The Thoracic Cage Ribs 1–7 (True Ribs) ____________________
Connected to the sternum by costal cartilages

9. 7-8 The Thoracic Cage __________________
Vertebrochondral ribs (ribs 8–10)
Fuse together
Merge with cartilage before reaching the sternum
Floating or vertebral ribs (ribs 11–12)
Connect only to the vertebrae and back muscles
__________________________

10. Figure 7-23a The Thoracic Cage
Jugular notch T1
Clavicular articulation 1
Manubrium 2 3
Sternum
Body
True ribs
(ribs 1–7) 4
Xiphoid
process 5
Costal
cartilages 10
T11 6
T12 11 7
Vertebrochondral
ribs
(ribs 8–10) 12 8 9
False ribs
(ribs 8–12)
Floating ribs
(ribs 11–12)
An anterior view, showing the
costal cartilages and the sternum 10

11. 7-8 The Thoracic Cage Structures of the Ribs The head (capitulum)
At the vertebral end of the rib
Has superior and inferior articular facets
The neck
The short area between the head and the tubercle

12. 7-8 The Thoracic Cage Structures of the Ribs ________________________
Attaches muscles of the pectoral girdle and trunk
Attaches to the intercostal muscles that move the ribs

13. A superior view of the details of rib
Figure 7-24a The Ribs
Transverse
costal
facet
Tubercle
of rib
Angle
Neck
Vertebral
end
Demifacet
Head
(capitulum)
A superior view of the details of rib
structure and the articulations between
the ribs and thoracic vertebrae. 13

14. A posterior view of the head of a
Figure 7-24b The Ribs
Head
Neck
Attachment to
costal cartilage
(sternal end)
Articular facets
Tubercle
Body
Angle
Costal groove
A posterior view of the head of a
representative rib from the right side (ribs 2–9). 14

15. 7-8 The Thoracic Cage The Sternum _____________
In the midline of the thoracic wall
Three parts of the sternum
_______________
The sternal body
______________

16. 7-8 The Thoracic Cage Manubrium The superior portion of sternum
Broad, triangular shape
_________________________
Articulates with cartilages of first rib pair
Has a jugular notch, a shallow indentation between clavicular articulations

17. 7-8 The Thoracic Cage The Sternal Body The Xiphoid Process
_______________
Attaches to the manubrium
_______________________
The Xiphoid Process
______________________
Attaches to the sternal body
Attaches to diaphragm and rectus abdominis muscles

18. Figure 7-23a The Thoracic Cage
Jugular notch T1
Clavicular articulation 1
Manubrium 2 3
Sternum
Body
True ribs
(ribs 1–7) 4
Xiphoid
process 5
Costal
cartilages 10
T11 6
T12 11 7
Vertebrochondral
ribs
(ribs 8–10) 12 8 9
False ribs
(ribs 8–12)
Floating ribs
(ribs 11–12)
An anterior view, showing the
costal cartilages and the sternum 18

19. 7-8 The Thoracic Cage Development of the Sternum
The developing sternal body
_______________________
Completes fusion about age 25
Leaving transverse lines
The xiphoid process
_____________________
Can easily be broken away

20. PROCEDURE Go to vertebrae and thoracic cage link on my weebly
Complete spine order, vertebrae 1,2, and 3, and thoracic 1 and 2. Show me each when done
Then complete axial skeleton quiz 1 and 2-links on my weebly-show me when done
Last, complete axial skeletal quiz-link on weebly