STRUCTURE OF UXSTRirED MUSCLE. 583 



ness of the skin termed cutis anserina, or. goose-skin. It 

 occurs also in the superficial portion of the cutis, in all 

 parts where hairs occur, in the form of flattened roundish 

 bundles, which lie alongside the hair-follicles and sebaceous 

 glands. They pass obliquely from without inwards, em- 

 brace the sebaceous glands, and are attached to the hair 

 follicles near their base (fig. 157). 



To this kind of muscular fibre the term organic is often 

 applied, from the fact that it enters especially into the 

 construction of such parts as are concerned in what has been 

 called organic life (see note, p. 464). 



The muscles of animal life, or striped muscles, include the 

 whole class of voluntary muscles, the heart, and those 

 muscles neither completely voluntary nor involuntary, which 

 form part of the walls of the pharynx, and exist in many 

 other parts of the body, ^. 158.* 



as the internal ear, ure- 

 thra, etc. All these 

 muscles are composed 

 of fleshy bundles called 



fasciculi, enclosed in ^^JI|S BH^SB^ \^\V 



coverings of fibro-cellu- ^gfr 



lar tissue, by which each 

 is at once connected 

 with, and isolated from, 



those adjacent to it (fig. 158). Each bundle is again 

 divided into smaller ones, similarly ensheathed and simi- 

 larly divisible ; and so on, through an uncertain number 

 of gradations, till one arrives at the primitive fasciculi, or 

 the muscular fibres peculiarly so called. 



* Fig. 158. A small portion of muscle, natural size, consisting of 

 larger and smaller fasciculi, seen in a transverse section, and the same 

 magnified 5 diameters (after Sliarpey.) 



