Describe the actions of the two opposing muscles (circular and longitudinal) that you observe while the specimen glides about. How does the planarian respond to being touched with a toothpick? To being gently flipped over? Are there any differences in the color of the dorsal and ventral surfaces of the specimen? If so, how can you account for these colors?
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- Circular muscles contract to make the planarian's body longer and thinner. - Longitudinal muscles contract to make the body shorter and wider. - The coordinated contraction and relaxation of these muscles allow the planarian to glide smoothly. Show more…
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