PHYSIOLOGY : PRACTICUM V : PLATE XVI. 

 HEAD AND NECK OF CAT PARTLY DISSECTED 



PLICA (third lid) 



-I 



coronoid process 



temporal crest 

 sagittal crest 

 arthral coudyle 



"" lambdoidal crest 

 -~ auditory bulla 



CARTI- 

 LAGE^ OK 

 LARYNX 



- CAROTID ARTERY 

 VAGUS NERVE 



cricoid 

 THYROID BODY 

 TRACHEA 



Compare with Plates I, and II. The tip of the nose has been cut off, and the muscles 

 (TEMPORAL and MASSETER) removed ; they arise from the side of the CRANIUM 

 and the ZYGOMA and are inserted upon the MANDIBLE (lower jaw) so as to close it vig- 

 orously. Some muscles have also been removed from the throat and neck so as to expose 

 the LARYNX, the HYOID BONE, the TRACHEA, the CAROTID ARTERY, VAGUS 

 (pneumogastric) NERVE and THYROID BODY ; in man the lateral lobes of the thyroid 

 are connected across the trachea by an isthmus. 



The nerve here shown really includes within one sheath two nerves, the vagus and the 

 CERVICAL SYMPATHIC (sympathetic) ; for the sake of clearness they are not distin- 

 guished ; neither are their ganglia or branches shown ; only one branch of the carotid is 

 indicated. 



The TEMPORAL CREST is too near the meson in its cephalic part, so that the TEM- 

 PORAL FOSSA is made too extensive. 



i, POSTORBITAL PROCESS of the frontal bone which is connected by ligament 

 with the smaller projection (2) of the malar bone and thus incloses the ORBIT ; see PI. I. 



The tongue and papillae are better shown in Pi. XVII. 



The capital letters on the mandible indicate the four groups of TEETH. 



C, the tusk-like CANINE, longer than the rest. /, the three INCISORS. P the two 

 PREMOLARS (bicuspids). M, the single MOLAR. 



In the maxilla (upper jaw) the canine is easily recognized ; only one incisor appears, 

 the others being hidden behind it. The three other teeth are premolars. There is a single 

 small molar hidden niesad of the last pretnolar. 



