28 



Life and Health 



The ethmoid bone is situated at the root of the nose and 

 forms a part of the floor of the cranium. It is a remark- 

 ably light and spongy bone, and is so called because it is 

 perforated with numerous holes like a sieve, through which 

 the nerves of smell pass from the nose to the brain. 



FIG. 1 6. The Skull. 



39. The Face. The face is made up of fourteen bones, 

 which, with the exception of the lower jaw, are, like those 

 of the cranium, closely interlocked with one another. By 

 this union these bones help form a number of cavities 

 which contain most important organs. 



