ELEMENTARY PHYSIOLOGY. 



turns to right or left, the skull and the atlas move together, both 

 rotating on the process of the axis. 



SUMMARY. 



1 Occipital at back and base of skull 



foramen magnum. 



2 Parietal the side walls and roof. 

 / Cranium i Frontal the forehead bone. 



(brain-case) 2 Temporal bones of the temples. 



I Sphenoid irregular, bat-shaped. 



1 Ethmoid spongy, between the nasal and 



brain cavities. 

 SKULL . { i 2 Superior maxillary upper jaw. 



2 Palatal form back part of palate. 

 2 Nasal form the bridge of the nose. 



2 Lachrymal on nasal side of orbits con- 

 tain the tear ducts. 



V Face . . . -/ 2 Turbinated scroll-shaped bones of the 

 nose. 



1 Vomer separates the right and left nasal 



cavities. 



2 Malar cheek-bones. 



i Inferior maxillary the lower jaw. 



Bones forming the Orbits . . 



Lachrymal inner portion. 

 Superior maxillary under portion. 

 Malar outer portion. 



QUESTIONS ON LESSON III. 



I Distinguish between skull, cranium, and face. How many bones go to 



form each of these ? 

 2- Enumerate the bones of the cranium. How are these bones united with 



each other ? 



3. Describe briefly the positions and forms of the bones of the cranium. 



4. What is the foramen magnum ? Where is it, and what is its use ? 



5. Describe the arrangement by which the head is enabled to nod. 



6. Give a list of the bones which form the face. 



7. In which of these bones are the teeth fixed ; and which of them form the 



roof of the mouth ? 



8. What is the character of the joint by which we move the lower jaw ? 



9. Name the bones which form the orbits of the eyeballs. 



to. Describe the arrangement which enables us to turn the head to the right 



and left. 

 II. Make out a table of all the bones of the head. 



