Bioscience Lab Animal Diversity I

Terms in this set (19)

Radial symmetry

Body plans that are organized circularly so that any longitudinal slice produces a mirror image

Bilateral symmetry

Definite right and left halves

Contain two germ layers:ecto/endoderm

Covers the surface of the embryo and gives rise to the outer covering of the animal (epidermis)

Inner most layer, lines the developing digestive tube and gives rise to the gastrodermis

Three germ layers, contains mesoderm

Between ectoderm and endoderm, forms muscle and most other organs

(Coelom) triploblastic animals contain a fluid-filled space separating the digestive tract from the outer body wall

Animals that contain a true coelom

Pseudocoelomates

Triploblastic animals whose body cavity only partially lined by tissue derived from the mesoderm

Triploblastic animals who lack a body cavity in which mesoderm fills the empty space

Sponge, asymmetrical, no distinct tissue plan, no body cavity

Intestinal round worm, bilateral, triploblastic, pseudocoelomate, Ascaris sp.

Platyhelminthes Trematoda

Chinese liver fluke, bilateral, triploblastic, acoelomate, Chlonorchis sinesis

Cnidarian Anthozoa

Coral, bilateral, diploblastic, none

Cnidarian Scyphozoa

Jellyfish, radial, diploblastic, none, Physalia sp.

Platyhelminthes Turbellaria

Planaria, bilaterial, triploblastic, acoelomate, Planaria sp.

Platyhelminthes Cestoda

Tapeworm, bilateral, triploblastic, acoelomate, Taenia pisiformis

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