BONKS- 



197 



CONVERSATION VIII* 



Locomotive organs bones composition of bone ossi- 

 fication nutrition and reparation of bones -joints 

 skeleton skeleton of the loiver animals adaptation of 

 the human skeleton to the erect position human foot 

 and hand.- The muscles attachment of the muscles 

 to the bones- action of the muscles, on the principle of 

 the lever. Standing mechanical contrivances in the 

 leg of birds walking leaping running influ- 

 ence of education on the muscles gymnastic exercises. 



Dr. B. Having finished the functions of the nervous 

 system, we come next to^those of the locomotive organs ; 

 those by which we are enabled to act upon foreign ob- 

 jects, and transport our bodies from pla^e to place ac- 

 cording to the suggestions of the will. The organs of 

 motion may be divided into classes ; the active, and the 

 passive the former composing the muscles ; the lalter,. 

 the bones. And first let us speak of the bones. 



Many of the inferior animals have in the interior of 

 their bodies and limbs, a certain series of bones connec- 

 ted together by a definite method of arrangement, which 

 so far as it exists, is generally the same in all. This 

 series of bones is called the skeleton.. It constitutes the 

 basis and support of the soft parts, and gives to the body 

 its general forms and dimensions. The substance of 

 which a bone is composed, is of two kinds. That com* 

 posing the external portion of the bone, is of a hard con> 

 17* 



