Self-Assessment
Glossary
Below is a list of terms identified in this module.
- Bilateral Symmetry
- type of symmetry in which there is only one plane of symmetry, so the left and right halves of an animal are mirror images
- Choanocyte
- (also, collar cell) sponge cell that functions to generate a water current and to trap and ingest food particles via phagocytosis
- Ecdysozoa
- clade of protostomes that exhibit exoskeletal molting (ecdysis)
- Eumetazoa
- group of animals with true differentiated tissues
- Eumetazoa
- group of animals with true differentiated tissues
- Gastrula Stage
- stage of animal development characterized by the formation of the digestive cavity
- Germ Layer
- collection of cells formed during embryogenesis that will give rise to future body tissues, more pronounced in vertebrate embryogenesis
- Lophotrochozoa
- clade of protostomes that exhibit a trochophore larvae stage or a lophophore feeding structure
- Parazoa
- group of animals without true differentiated tissues
- Radial Symmetry
- type of symmetry with multiple planes of symmetry, with body parts (rays) arranged around a central
disk
Glossary terms from OpenStax College Concepts of Biology licensed under CC-BY 3.0.
Grant and Other Information

This work by Community College Consortium for Bioscience Curriculum is licensed under a Creative Commons Attribution 3.0 Unported License.
Text from BioBook licensed under CC BY-NC-SA, Boundless Biology Open Textbook licensed under CC BY SA, and OpenStax College licensed under CC BY 3.0. Modified by Courtney A. Harrington, PhD for C3BC.
Instructional design by Nicole P. Lipscomb, M.S., Helen Dollyhite, M.A., Caroline Smith, M.S., Irene Yee Chief, Ph.D. and Courtney A. Harrington, Ph.D. for c3bc.
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