Flatworms (phylum platyhelminthes) Procedure 1. Observe the live planaria, if present, under the dissecting. If there are no live specimens, view this video: https://www.youtube.com/watch?v=w0QzSYQGsnA a. What type of symmetry does the planaria display? b. Does the planaria exhibit cephalization? c. Can you locate the planaria eyespots? What do the eyespots sense? 2. View the large planaria model. Make sure you can identify the pharynx, the eyespots, and the flame cells. a. Does the planaria have a complete or incomplete digestive system? b. What is the function of the flame cell? c. Are planaria hermaphrodites? d. Scientists say planaria have ladder like organs. Why?

Flatworms (phylum platyhelminthes) Procedure 1. Observe the live planaria, if present, under the dissecting. If there are no live specimens, view this video: https://www.youtube.com/watch?v=w0QzSYQGsnA a. What type of symmetry does the planaria display? b. Does the planaria exhibit cephalization? c. Can you locate the planaria eyespots? What do the eyespots sense? 2. View the large planaria model. Make sure you can identify the pharynx, the eyespots, and the flame cells. a. Does the planaria have a complete or incomplete digestive system? b. What is the function of the flame cell? c. Are planaria hermaphrodites? d. Scientists say planaria have ladder like organs. Why?

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter28: Development And Inheritance

Section: Chapter Questions

Problem 1ILQ: View this time-lapse movie (http://openstaxcollege.org/l/conceptus) of a conceptus starting at day...

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Pre-Darwinian Concepts

Question

Flatworms (phylum platyhelminthes)
Procedure
1. Observe the live planaria, if present, under the dissecting. If there are no live
specimens, view this video: https://www.youtube.com/watch?v=w0QzSYQGsnA
a. What type of symmetry does the planaria display?
b. Does the planaria exhibit cephalization?
c. Can you locate the planaria eyespots? What do the eyespots sense?
2. View the large planaria model. Make sure you can identify the pharynx, the
eyespots, and the flame cells.
a. Does the planaria have a complete or incomplete digestive system?
b. What is the function of the flame cell?
c. Are planaria hermaphrodites?
d. Scientists say planaria have ladder like organs. Why?

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