The lateral cords contain canals of the excretory system, in many species, and the dorsal an ventral cords contain nerve trunks.
(The lateral cords; contain; canals of the excretory system) (an ventral cords; contain; nerve trunks; L:in many species; L:the dorsal)
The lateral cords an ventral cords
contain contain
canals of the excretory system
nerve trunks L:in many species L:the dorsal