THE SPECIAL SENSES 



( Cartilaginous framework. 

 Fatty tissue. 



Outr 



Middl* 



Internal 



Collects sound waves and reflect* 

 L them into the auditory canal. 

 ( 1\ inch long. 



J Closed internally by the drum. 

 I Glands secrete "wax." 

 i Hairs directed outwards. 

 f An irregular cavity in the temporal bone. 

 [ Malleus. 

 | Incus. 

 [ Stapes. 



I Fenestra ovalis closed by th 

 j stapes. 



1 Fenestra rotunda closed by a 

 I membrane. 



j Central portion. 

 < Fenestra ovalis. 

 f Three in number. 

 j Open into the vesti- 

 [ bule. 

 A spiral tube. 

 2 turns round th 

 modiolus. 



Canal 



Bones 



Openings 



f Vestibule 



Canals 



Cochlea 



. Fenestra rotunda. 

 Within the osseous. 

 Similar in shape. 

 Surrounded by perilymph. 

 Contains endolymph. 

 Otoliths and hair-like procewti. 

 Terminal fibres of auditory nirte. 



QUESTIONS FOR TOPICAL REVIEW 



1. What is said of the production of sensation? 



2. What is said of the variety of sensation? 



3. What is said of the general sensibility ? 



4. W T hat is said of the sensation of pain ? 



5. What is said of the uses of pain ? 



6. Say what you can of the special sensation 



7. Say what you can of the organs of touch 



8. Say what you can of the sense of touch 



9. Say what you can of the delicacy of touch 



10. What is understood of the sensations of temperature and weight ?. 



11. What is understood by the organ of taste ? 



12. What is understood by the sense of taste ? 



13. What is understood by the relations of taste 



14. Explain the influence of education, etc 



15. Explain the sense of smell 



251, 252 

 .. 252 

 253, 254 

 .. 254 

 254-256 

 256-258 

 258, 25 

 259-261 



261, 262 



262, 263 

 263,264 

 264, 265 



266, 267 

 .. 267 



267, 2fi8 



