258 



LABORATORY MANUAL OF HUMAN ANATOMY 



(c) Larger alar cartilage (cartilago alaris major). 



(ca) Lateral crus (cms laterale). 



(cb) Medial crus (crus mediale). 



(d) Lesser alar cartilages (cartilagines alares minores). 



Are any sesamoid cartilages present f 



External Ear, or Auricle. (Fig. 109.) 



Though the auricle (auricula) (0. T. pinna) belongs to the 

 cranium rather than to the face, it can be most conveniently 

 dissected at this stage. 



FIG. 109. 



Helix 

 Fossa triangularis 



Crura anthelicis 

 Anthelix 



Scapha 



Concha 

 auri- 

 culae 



Cymba x 

 conchae 



Cavum. N 

 conchae ? 



Incisura anterior, 

 Meatus auditorius externus. 



Tragus - y| 

 Incisura intertragica ''I 



Lobulus auriculae 



helicis 



\ 



Sulcus auriculae posterior 



Antitragus 



The external ear (auricula) of a young woman. (After Toldt, Anat. Atlas, Wien, 1903, 



3 Aufl., p. 920, Fig. 1406.) 



Make a careful drawing first of the lateral surface, then of 

 the medial surface. Indicate- 

 On the lateral surface 



(a) Lobule of auricle (lobulus auriculae). 



(b) Tragus (tragus). 



(ba) Hairs of tragus (tragi). 



(c) Cartilage of antitragus (antitragus) . 



(d) Intertragic notch (incisura intertragica). 



(e) Anterior notch (incisura anterior). 



(f) Concha of auricle (concha auriculae). 



(fa) Cymba of concha (cymba conchae) (" boat of the concha"). 



(fb) Cavity of concha (cavum conchae). 



(g) Coil (helix). 



(ga) Crus of coil (crus helicis). 



