Biology 03050, Invertebrate Zoology
Handout for Laboratory 12: ECHINODERMS
Manual: Hickman et al., 9th ed., Exercise 17, pp. 251-267
name:_______________________________________________________________________
WORD BANK (terms that you are responsible for):
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Using your lab manual, perform those parts of Exercise 17 listed below:
17: Read over the introduction to the phylum, pp. 251-252.
17A: Using a preserved sea star, examine external and internal features, highlighting the terms listed above. Note how its contents are radially arranged. Follow the water-vascular system from the madreporite plate to the tube feet. Be sure to follow up with a slide of a cross section of a sea star ray--it's important to visualize 3-D structures in 2-D!
17B: Examine external features of a preserved brittle star. How does this differ from a sea star?
17C: Examine external features of preserved sea urchins and sand dollars. Can you see narrow tube feet on the sea urchin?
17D: Examine external features of a preserved sea cucumber. Where are the typical features of an echinoderm in a sea cucumber? Dissect a preserved sea cucumber, highlighting the structures mentioned in the word bank. How do these internal features differ from those of the sea star? Do they reflect the different lifestyle seen in the sea cucumber?
17E: Examine external features of the cast of the sea lily fossil. Note its stalk and upward-facing oral surface.
Your instructor may assign you additional questions from the lab manual as homework and/or as quiz questions.
Your notes and drawings:
|main page| |background| |03028: Physiology| |03048: Anatomy|
|03050: Invertebrate Zoology| |03051: Vertebrate Zoology| |03074: Economic Botany|
Please send comments and questions to: cronewil@hvcc.edu
Copyright 1999 by Wilson Crone
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This page updated October 25, 1999