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Earthworm anatomy
This is a basic outline of the uses and the names of the parts of an earthworm.
16
Biology
9th Grade
05/09/2012

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Term
Anterior
Definition
Of or toawrds the head
Term
Posterior
Definition
Of or towards the tail
Term
Dorsal blood vessel/
Ventral blood vessel
Definition
Circulatory system, pump blood throughout the body
Term
Aortic arches
Definition
Circulatory system, acts like a heart pumping blood into nerve cords
Term
Cuticle
Definition
The moist layer of coveringover the earthworm's epidermis
Term
Ganglia
Definition
Nervous system, Masses of neve cell bodies that compose the brain
Term
Ventral nerve cord
Definition
Nervous system, travels down the bottom of the earthworm transporting signals from the brain
Term
Seminal vesicles
Definition
Reproductive system, store sperm produced by the testes
Term
Oviducts
Definition
Reproductive system, stores eggs produced by the ovaries
Term
Seminal receptacles
Definition
Reproductive system, where the sperm of the other worm is emptied into that of its mate
Term
Setae
Definition
Movement, small bristles on the body
Term
Pharynx
Definition
Digestive system, ingests soil into the mouth by a sucking action
Term
Crop
Definition
Digestive system, soil is stored
Term
Gizzard
Definition
Digestive system, muscular contraction grind the soil breakiung it into small pieces
Term
Intestine
Definition
Excretion system, UN digestable food passes through here and out the anus
Term
Nephridia
Definition
Excretion system, push excess waste out of the earthworm through tiny holes called nephridiopores
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