Crayfish - Dissection

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SEBASTIAN's FINAL HOURS

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Patient #001885: Sebastian

Specimen: Crayfish
Height: 9.5 in
Eye Color: Black
Weight: 3 oz
Ethnicity: Freshwater Crustacean

Biography: Crayfish can be found in both the Northern and Southern Hemisphere. Some of their more populated habitats are found in South America, Madagascar, and East Asia. They are found in bodies of water, and breathe through their feather-like gills. Crayfish are omnivores, and eat a variety of food, including fish, shrimp, water plants, and insects. Finally, a fun fact! Crayfish are known across the country as a wide variety of names, such as lobsters, crawdads, mudbugs,and yabbies.

REFER TO THE INFORMATIONAL DISSECTION VIDEO AT THE BOTTOM IF KNOWING HOW TO DISSECT THIS ORGANISM IS DESIRED. THE VIDEO CONTAINS A DETAILED VISUAL AND VOICEOVER.

EXTERIOR ANATOMY

Brain: Main organ of the crayfish.

Stomach: A digestive organ used to break down foods.

Digestive Gland: Used to digest foods consumed by the crayfish/

Testes: Male genital organs used for creating and storing sperm.

Heart: Muscle used to pump blood throughout the body.

Eye: Sensory organ used to sense light.

INTERIOR ANATOMY

Carapace: Hard protective shell.

Eye: Sensory organ used to sense light.

Antenna: Senses touch and taste.

Teslson: Posterior extension of body used for swimming.

Uropod: Comes in a pair located at the tail, used for swimming.

Rostrum: Hard carapace that covers the head.

Cheliped: 1st walking leg also used to defend against predators.

Dissection Procedure

INFORMATIONAL DISSECTION VIDEO ABOVE

WORKS CITED

http://dj003.k12.sd.us/science%20labs/dissection/crayfish_dissection.htm

https://quizlet.com/24125785/crayfish-exterior-terminology-flash-cards/