Anatomy

List of the anatomical parts of the earthworm:

• somites or metameres- body segments
• pharynx- used as a tongue to gather food from the exterior and brought into the esophagus
• brain-control center of the worm
• aortic arches-"hearts" which compress to circulate blood around the worm, they consist of five pairs
• esophagus-transport food from the pharynx to the crop
• crop- stores food
• gizzard- breaks up food that is stored in the crop
• intestine- absorbs the nutrients needed for proper function
• dorsal/ventral blood vessels- circulate blood throughout the worm
• seminal vesicles- contain the male reproductive organs
• clitellum- collar used in reproduction
• mouth- used to acquire food
• anus- used to expel wastes
• setae- bristles in the ventral part of the worm used for movement