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EBCModule#11

QuestionAnswer
Invertebrates Animals that lack a backbone.
Vertebrates Animals that possess a backbone.
Spherical Symmetry An organism possesses Spherical Symmetry if it can be cut into two identical halves by any cut that runs through the organism's center.
Radical Symmetry An organism possesses Radical Symmetry if it can be cut into two identical halves by any longitudinal cut through the center.
Bilateral Symmetry An organism possesses Bilateral Symmetry if it can be cut into two identical halves by a single longitudinal cut along it's center which divides it into right and left halves.
Epidermis An outer layer of cells designed to provide protection.
Mesenchyme The jelly-like substance that separates the Epidermis from the inner cells in a sponge.
Collar Cells Flagellated cells that pump water into a sponge.
Amebocytes Cells in a sponge that preform digestion and transport functions.
Gemmule A cluster of cells encased in a hard, spicule-reinforced shell.
Polyp A sessile, tubular cnidarian with a mouth and tentacles at one end and a basal disk at the other.
Medusa A free-swimming cnidarian with a ball-shaped body and tentacles.
Epithelium Animal tissue consisting of one or more layers of cells that only have one free surface, because the other surface adheres to a membrane or some other substance.
Mesoglea The jelly-like substance that separates the epithelial cells in a cnidarian.
Nematocysts Small capsules that contain a toxin which is injected into pray or predators.
Testes The organ that produces sperm.
Ovaries The organ that produces eggs.
Anterior End The end of an animal that contains its head.
Posterior End The end of an animal that contains the tail.
Circulatory System A system designed to transport food and other necessary substances throughout a creature's body.
Nervous System A system of sensitive cells that respond stimuli such as sound, touch and taste.
Ganglia Masses of nerve cell bodies.
Hermaphroditic Possessing both the male and the female reproductive organs.
Regeneration The ability to re-grow a missing part of the body.
Mantle A sheath of tissue that encloses the vital organs of a mollusk, secretes a shell, and preforms respiration.
Shell A tough, multilayered structure secreted by the mantle. It is usually used for protection, but sometimes for body support.
Visceral Hump A hump that contains a mollusk's heart, digestive, and excretory organs.
Foot A muscular organ that is used for locomotion and takes a variety of forms depending on the animal.
Radula A organ covered with teeth that mollusk use to scrap food into their mouths.
Univalve An organism with a single shell.
Bivalve An organism with two shells.
Created by: biowolf2013
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