94 



GENERAL CONCEPTS 



Biadd 



cr 



A B 



Contra-ctile. vacaole Flajne ceil 



(Ameba) 



(Flat worm) 



Ne.phrid.IuTn. 

 (Earthv/orm) 



DowmdTi'5 

 Glomarulu.s 



oximal convoluted 

 tubule 



Secondary capil- 

 la^ry nctv/orlc 



-Distal convo- 

 lu-tedL tubuLa. 



Interlobu 

 levT artery, 



Arcuate, art 

 and vein. \ 



BrancK. of ' 



ren.al 





^-'■'y^/'" Collecting 

 duct > 



BnancK of 

 enal vein. 



Kidriey tubule (Ve-i^te-brate) 

 Figure 5.6. The excretory systems of {A) ameba, {B) flatworm, (C) earthwonn and 

 (D) vertebrate. 



