The anatomist's vade mecum : a system of human anatomy . per border of themanubrium. These pre-sternal or supra-sternal pieces, which are byno means constant, appear at about the thirty-fifth year. Beclardconsiders them to be the analogue of the fourchette of birds, andBreschet as the sternal ends of a pair of cervical ribs. Articulations.—With sixteen bones; viz. with the clavicles and theseven true ribs, at each side; the latter articulating by means of thecostal cartilages. Attachment of Muscles.—To nine pairs and one single muscle; the pectoralis major, sterno-mastoid, sterno-hyoid,
The anatomist's vade mecum : a system of human anatomy . per border of themanubrium. These pre-sternal or supra-sternal pieces, which are byno means constant, appear at about the thirty-fifth year. Beclardconsiders them to be the analogue of the fourchette of birds, andBreschet as the sternal ends of a pair of cervical ribs. Articulations.—With sixteen bones; viz. with the clavicles and theseven true ribs, at each side; the latter articulating by means of thecostal cartilages. Attachment of Muscles.—To nine pairs and one single muscle; the pectoralis major, sterno-mastoid, sterno-hyoid, sterno-thyroid, EIBS—TRUE AND FALSE. 73 triangularis sterni, aponeurosis of the obliquus externus, internus, andtransversaKs muscles, rectus, and diaphragm. Ribs.—The ribs are twelve in number at each side : the first sevenare connected with the sternum, and are thence named sternal or trueribs; the remaining five are the asternal or false ribs; and the lasttwo, shorter than the rest, and free at their extremities, are i\\tfloati7ic/ Fig. 33.*. ribs. The ribs increase in length from the first to the eighth, whencethey again diminish to the twelfth; in breadth they diminish gradu-ally from the first to the last, and, with the exception of the last two,are broader at the anterior than at the posterior end. The first rib ishorizontal in its direction; all the rest are oblique, so that theanterior extremity falls considerably below the posterior. Each ribpresents an external and internal surface, a superior and inferior * An anterior view of the thoi^ax. 1. The superior piece of the The middle piece. 3. The inferior piece, or ensiform cartilage. 4. Thefirst dorsal vertehra. 5. The last dorsal vertebra. 6. The first rib. 7. Itshead. 8. Its neck, resting against the transverse process of the first dorsalvertebra. 9. Its tubercle. 10. The seventh or last true rib. 11. The costalcartilages of the true ribs. 12. The last two false ribs or floating The groove
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
