ARTICULA TIONS. LIGAMENTS. 



469 



FIG. 343. RIBS OF LEFT SIDE, POSTERIOR ASPECT. 



1-12. Anterior extremities of twelve ribs of left side. 13, 13. Internal surface. 14,14. External surface. 

 15. Head of first rib. 16. Mead of second rib. 17. Head of third rib. 18, 18. Heads of ribs from 

 fourth to ninth. 19. Head of tenth rib. 20, 20. Heads of eleventh and twelfth ribs. 21, 21. Necks 

 of ribs. 22. Tubercle of first rib. 23. Articular facet of tubercle of second rib. 24,24. Articular 

 facets of tubercles of ribs from third to ninth. 25. Articular facet for tubercle of tenth rib. 26, 26. 

 Angles of ribs. 



FIG. 344. THORAX, ANTERIOR VIEW. 



I. Manubrium sterni. 2. Gladiolus. 3. Ensiform cartilage or xiphoid appendix. 4. Circumference of 

 apex of thorax. 5. Circumference of base. 6. First rib. 7. Second rib. 8,8. Third, fourth, fifth, 

 sixth, and seventh ribs. 9. Eighth, ninth, and tenth ribs. 10. Eleventh and twelfth ribs, n, n. 

 Costal cartilages. 



