MOUTH-------NEPHRIDIA-------SETAE-------PHARYNX------
ESOPHAGUS--------AORTIC ARCHES----------CROP-----
GIZZARD------INTESTINE--------VENTRAL NERVE CHORD----
DORSAL BLOOD VESSEL------OVARIES-----TESTES----
HOW DO WORMS ACQUIRE OXYGEN--------DORSAL----
VENTRAL------POSTERIOR------ANTERIOR--------
CLITELLUM------HERMAPHRODITE--------
