Earthworm (with labels)

Annelida -- physiology

Earthworms

Dissection

Seven photos of an earthworm in various stages of dissection with various parts labeled. Two photos shows the worm being held open with pins.

Image 1: Earthworm - External Features
- clitellum
- mouth
- anus

Image 2: Earthworm - Ventral Anterior View
- male genital pore
- sperm groove
- clitellum

Image 3: Earthworm - Anterior (Close Up)
- setae

Image 4: Earthworm - Internal Features [pins are used to hold the specimen open]
- pharynx
- 'heart'
- crop
- gizzard
- intestine
- septum
- dorsal blood vessel
- seminal vesicles
- anterior spermatheca

Image 5: Earthworm - Internal Features (Seminal Vesicles Removed) [pins are used to hold the specimen open]
- pharynx
- 5 'hearts'
- gizzard
- crop

Image 6: Earthworm - Internal Features (Close Up)
- Posterior - Anterior
- intestine
- gizzard
- crop
- dorsal blood vessel
- esophagus
- 'heart'
- nerve cord
- ventral blood vessel

Image 7: Earthworm - Cross Section
- digestive tract
- typhlosole
- longitudinal muscles

Biological Sciences

State University of New York at Buffalo

10/3/2005

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Photograph

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Still Image

BIO-001