Prostomium 



Mouth cavity 



Cerebral gangffon "brain' 

 Circumpharyngeal connective 



Pharynx 

 Pharyngeal muscle 



Septum 

 "Heart" 



Nephridium 



_ Nephridiopore 



Seminal receptacle 

 Esophagus 



Testis 

 Sperm funne 



Seminal vesicle 



Cut edge of seminal vesicle 



Vas efferent 



Intestine 



Typhlosole 



Vas deferens 

 Ovary 

 Egg funne 



Oviduct 

 Egg sac 

 Crop 



Dorsal blood vessel 



Gizzard 



Ventral nerve cord 



Figure 91. Anterior part of an earthworm with dorsal body wall removed to show the 

 internal organs. 



172 



