226 



MICROSCOPIC ANATOMY OF THE ORGAXS. 



a membrana propria, and a layer of connective tissue. The 

 appearance of the tubules, especially of the epithelial layer, 

 differs markedly according to the condition of functional 

 activity (spermatogenesis). 



The tubules join together, decreasing in number, and finally 

 pass over into the tubuli recti. These are distinguished from 

 the tubuli contort! by their straight short course and by their 

 small diameter (20-50 (i). Their structure is simple, the walls 



FIG. 175. 



Epithelial I ^## ' ,V * $ '; / '. ; i ! /J, ( .** V ^V* ' ; . * ""' '>\*<^ 



>.-/'--;:"..'; '"'** fX^^'V * V V\< J 



t?e*tffe l^r^^/^^^'^^'.i^^ /' V '.*.''' . i'X^**?.***^ ' ' .Vs"" 

 inv^r-<^ ',;;V'^'x;^,T; :;>,:- i^i ^ '-':.' .>Xvv >*'**' ,'^ / >-' 



*f/rm/ >-*^V^^V. J ';,' .":"?';'.;. **-.t -v^, . v .*'' ; .*'.' 



'""" ^ : >o7^^ n 



H. .^li^'-:Sii% 



:%: 'v: ;.;/- >r:- .^i^vr^;^'^' 

 'Vv'-:^.^'--:^ 1 .- ^: .".'; : -^'s-&* 



Interstitial ^;"-'-* x i'-*; ',''* * \ V?/^ '> V*^- * ^ : ^ "'*? : '* ** * * *" ' 



- : ' .'V,*//-* '"' *^h t vv*r*-'"j : **-*" 5'; v :"'"* 



. >." - : _j^!^^'i\ .": .. - * : * % , -; ' .' : ' ' 



1 *^^-T-r^T^ : : ^ '-*, ' *. vv*i_. :: v*' 



consisting of a membrana propria and a layer of low cylin- 

 drical epithelial cells. They are interposed between the tubuli 

 con tor ti and the rete testis. 



The rete testis, which is contained in the corpus Highmori, 

 consists of canals of an unequal thickness, lined merely with a 

 single layer of cubical or flat epithelial cells. The tubules of 

 the rete testis pass over into the epididymis. 



Between the convolutions of the tubuli contort! there lies a 

 loose connective tissue which is in connection with that of 



