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THE SENSORIAL FUNCTION, 



SECTION OF THE HEAD, 



a The nasal bone, or bone of the nose. 



6 The frontal bone. The cavities or cells beneath are called the frontal sinuses. 



c The crest or ridge of the parietal bones. 



d The tentorium or bony separation between the cerebrum and cerebellum. 



e The occipital bone. 



/ The ligament of the neck, or pack-wax, by which the head is chiefly supported. 



g The atlas, sustaining or carrying : the first bone of the neck. 



h The dentata, tooth-like, or second bone of the neck. 



t The cuneiform, or wedge-shaped process, or base of the occipital bone. Between it and 

 the other portion of the occipital bone e, lies the great foramen or aperture through 

 which the prolongaiion of the brain — the spinal marrow — issues from the skull. 

 The sphenoid, wedge-like, bone, with its cavities. 

 The ethmoid, sieve-like, bone, with its cells. 



m The cerebrum, or brain, with the appearance of its cortical and medullary substance. 



n The cerebellum, or little brain, with its beautiful arborescent appearance. 



o A portion of the central medullary, marrow-like, substance of the brain, and the prolonga- 

 tion of it under the name of the crus cerebri, leg of the brain, and from which many 

 of the nerves take their origin. 



p The medulla oblongata — the prolongation of the brain after the medullary substance of the 

 cerebrum and cerebellum have united, and ibrming the commencement of the spinal 

 marrow. The columnar appearance of this portion of the brain is represented, and 

 the origins of the respiratory nerves. 



q The spinal marrow extending through a canal in the centre of the bones of the neck, back, 

 and loins, to the extremities of the tail, and froiii whirh the nerves of feeling and 

 of motion, that supply every part of the frame except the head, arise. 



r The septum narium, or cartilaginous division between the nostrils. 



s The same cut oif at the lower part, to show the spongy turbinated, turban-shaped, bones, 

 filling the cavity of the nostril. 



t The palate. 



« The molar teeth, or grinders. 



V The inferior maxillary bone, containing the incisor teeth or nippers. The canine tooth, ot 

 tush, is concealed by the tongue. 



w The posterior maxillary, or lower jaw with its incisors. 



X The lips. 



y The tongue. 



X A portion of the os hyoidcs, or bone of the tongue, like a Greek u, v. 



