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