Introduction Unit Flashcards
(28 cards)
All animals with _____ symmetry develop from 3 embryonic layers
Bilateral
A fluid-filled body cavity completely within the mesoderm
Coelomate
The head end of an animal
Anterior
When an animal can be divided into mirror halves
Bilateral Symmetry
The underside/belly of an animal
Ventral
What type of symmetry is a butterfly?
Bilateral
The inner layer of tissue
Endoderm
What type of symmetry is a lobster?
Bilateral
What type of symmetry is a sponge?
Asymmetrical
When an animal can be divided along any plane, as long as it radiates out from a central axis
Radial Symmetry
What does the endoderm develop into?
Digestive organs and the lining of the digestive tract
No tissue, irregular in shape, no symmetry or balance in body structure
Asymmetrical
The study of animals
Zoology
When the mouth develops from the first opening in the gastrula
Protostome
Nerve tissues/sense organs concentrated at the anterior end
Cephalization
No coelom
Acoelomate
A fluid-filled body cavity between the mesoderm and endoderm
Pseudocoelom
Which tissue layer is only found in highly evolved animals?
Mesoderm
The layer of tissue that forms between the ectoderm and endoderm
Mesoderm
The surface side of an animal
Dorsal
What type of symmetry is a sea anemone?
Radial
When the anus develops from the first opening of the gastrula
Deuterostome
What does the ectoderm develop into?
Nervous tissue and skin
What type of symmetry is a starfish?
Radial
