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The Worm

Earthworm

 

 

Taxonomy

Kingdom : Animalia

Phylum : Annelida

Class : Oligochaetae

Genus : Lumbricus

Species : Terrestris

 

Parts

Prostomium

Anterior end

Dorsal blood vessel

Segment

Clitellum

Posterior end

Anus

Pharynx

Ovary

Esophagus

Dorsal blood vessel

Seminal receptactes

Testis

Crop

Gizzard

Intestines

 

Systems

 

Excretory

Removal of waste formed during metabolism

Eg. CO2, nitrogenous waste (eg. Urea)

Respiratory

Intake of O2, giving of CO2

large surface area must allow exchange of gases

 close to circulatory system

Digestive

Processes food carbohydrates glucose, protein,

 amino acids.

Fats fatty liquids sp they can enter blood stream

and be carried to cells.

Nervous

Coordinate and regulate all activity

Circulatory

Pushes blood around body, may be closed (blood is in

tubes) (arteries in veins), open (blood in sinus), pumps present.

Skeletal/locamotary

Supportive, allows movement, hydrostatic, or external.

Reproductive

Ovary produce ova, testis produce sperm, fertilization

may be internal or external.

 

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By Anna and Yan