66 



HITCHCOCK'S ANATOMY 



bones found in the human body, all but thirty-four are found 

 in pairs, or one upon each side of the body. The single 

 bones are the frontal, occipital, ethmoid, sphenoid, vomer, 

 mandible, hyoid, sternum, twenty-four vertebrae, the sa- 

 crum and the coccyx. 



SYNDESMOLOGY. 



DESCRIPTION OF THE LIGAMENTS. 



149. Kinds of Articulation.— The modes or manner of 

 connection between the different bones of the body are three : 

 Synarthrosis, Amphiarthrosis, and Diarthrosis. The first of 

 these modes, means the joining of such bones as have no 

 motion between them ; the second, a joint with the aptitude 

 for movement between the immovable synarthrosis on the one 

 hand, and the movable diarthrosis on the other ; the third, a 

 movable articulation, which constitutes by far the greater 

 part of the joints of the body. 



150. Sutura, Ilarmonia, Schindylesis, Gomphosis. — Of 



Synarthrosis there are four varieties : first, Sutura, the ar- 

 ticulation between the bones of the skull by ragged inter- 

 locking edges ; second, Harmonia, that between the two upper 

 maxillaries, where the bones with comparatively straight 

 edges are simply placed edge to edge ; third, Schindylesis, or 

 the joint between the vomer and sphenoid, w^here the ex- 

 panded edge of one bone is fitted into a corresponding groove 

 in the other ; fourth, Gomphosis, the articulation of the teeth 

 with the jaw r s, and so named since it resembles the manner 

 in which a common nail is driven into a plank. 



14S. How many bones in the human body are found in pairs? Give the names of the 

 un mated bones. 149. How many modes of connecting the bones together? Describe 

 each. 150. Give the peculiarities of Sutura, of Harmonia, of Schindylesis, and of Gom- 

 phosis. Give an example of the latter. 



