122 



BIOLOGICAL PHYSICS 



composition, a continuity of circulatory media, and the 

 common function which they respectively subserve in the 



\p.s.c. 



FIG. 44. PLAN OF THE RIGHT MEMBRANOUS LABYRINTH VIEWED FROM 

 THE MESIAL ASPECT. (E.A.S.) Z\. 



it, utricle, with its macula and the three semicircular canals with their ampullae ; 

 j, saccule; ay. v. , aqueductus vestibuli ; s.e. , saccus endolymphaticus ; c.r. , canalis 

 reuniens; c.c., canal of the cochlea. 



economy of the cerebro-spinal lymph circulation, they are 

 identical in origin, and that the cerebro-spinal lymph 



FIG. 45. MEMBRANOUS LABYRINTH AND NERVOUS TWIGS DETACHED. 

 Magnified. (Breschet.) 



k' facial nerve in the meatus auditorius internus ; /, anterior division of the auditory 

 nerve giving branches, o, in, n, to the utricle and the ampullae of the superior 

 and external canals ; /', vestibular division of the auditory nerve, giving a 

 branch, q, to the saccule, another to the posterior ampulla, q, and a third (r) to 

 the cochlea, r ; a, I', c, ampullae of the superior, external, and posterior semi- 

 circular canals respectively , d, the united part of the superior and posterior 

 canals ; e, the macula of the utricle ; f, the saccule. 



producing and distributing machinery is called upon in 

 the physiological or healthy condition of the parts involved 

 to meet all demands. It must be regarded, however, as 



