Sand dollar (with labels)

Echinodermata -- Physiology

Sand dollars

Dissection

Ten photographs of various stages of the dissection of a sand dollar with specific parts labeled.

Image 1: Sand Dollar - External Features (Aboral View)

Image 2: Sand Dollar - External Features (Oral View)

Image 3: Sand Dollar - Oral View (Close up)
- ambulacral groove
- mouth (behind spines)
- podia ('tube feet')

Image 4: Sand Dollar - Aboral View (Spines Removed)
- gonopore
- anus
- petaloid ambulacra

Image 5: Sand Dollar - Oral View (Spines Removed)
- anus
- mouth
- ambulacral groove

Image 6: Sand Dollar - Aboral View (Close Up)
- gonopore
- petaloid ambulacra

Image 7: Sand Dollar - Internal Features [two specimens in the photo]
- [left photo] - aristotle's lantern
- esophagus
- stomach
- anus
- intestine
- gonad

Image 8: Sand Dollar - Cross Section
- gonad
- esophagus
- aristotle's lantern
- mouth
- stomach

Image 9: Sand Dollar - Aristotle's Lantern (Side View)

Image 10: Sand Dollar - Aristotle's Lantern (Oral View)

Biological Sciences

State University of New York at Buffalo

11/7/2005

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Photograph

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Still Image

BIO-001