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62 Cards in this Set
- Front
- Back
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invertebrates
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Animals that lack a backbone
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vertebrates
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Animals that possess a backbone
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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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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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Bilateral symmetry
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An organism possesses bilateral symmetry if it can 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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epidermis
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An outer layer of cells designed to provide protection.
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mesenchyme
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The jellylike substance that separates the epidermis from the inner cells in a sponge.
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collar cells
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Flagellated cells that push water through a sponge.
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amoebocytes
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Cells that move using pseudopods and perform different functions in different animals.
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gemmule
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A cluster of cells encased in a hard, spicule-reinforced shell.
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polyp
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The sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other.
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medusa
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A free-swimming cnidarian with a bell-shaped body and tentacles.
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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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mesoglea
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The jellylike 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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testes
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organs that produce sperm.
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ovaries
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Organs that produce eggs.
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anterior end
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The end of an animal that contains the head.
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posterior end
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The end of an animal that contains the tail.
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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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nervous system
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A system of sensitive cells that responds to stimuli such as sound, touch, and taste.
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ganglia
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masses of nerve cell bodies
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hermaphrodite
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Possessing both the male and female reproductive organs.
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regeneration
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The ability to regrow a missing part of the body.
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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 respiration.
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shell
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A tough, multilayered structure secreted by the mantle, generally used for protection, but sometimes for body support.
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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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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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radula
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An organ covered with teeth that mollusks use to scrape food into their mouths.
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univalve
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An organism with a single shell.
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bivalve
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An organism with two shells.
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invertebrates
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Animals that lack a backbone
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|
|
vertebrates
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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.
|
|
|
Radial symmetry
|
An organism possesses radial symmetry if it can be cut into two identical halves by any longitudinal cut through its center.
|
|
|
Bilateral symmetry
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An organism possesses bilateral symmetry if it can only be cut into two identical halves by a single longitudinal cut along its center which divides it into right and left halves.
|
|
|
epidermis
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An outer layer of cells designed to provide protection.
|
|
|
mesenchyme
|
The jellylike substance that separates the epidermis from the inner cells in a sponge.
|
|
|
collar cells
|
Flagellated cells that push water through a sponge.
|
|
|
amoebocytes
|
Cells that move using pseudopods and perform different functions in different animals.
|
|
|
gemmule
|
A cluster of cells encased in a hard, spicule-reinforced shell.
|
|
|
polyp
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The sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other.
|
|
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medusa
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A free-swimming cnidarian with a bell-shaped body and tentacles.
|
|
|
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.
|
|
|
mesoglea
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The jellylike substance that separates the epithelial cells in a cnidarian.
|
|
|
nematocysts
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Small capsules that contain a toxin which is injected into prey or predators.
|
|
|
testes
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organs that produce sperm.
|
|
|
ovaries
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Organs that produce eggs.
|
|
|
anterior end
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The end of an animal that contains the head.
|
|
|
posterior end
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The end of an animal that contains the tail.
|
|
|
circulatory system
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A system designed to transport food and other necessary substances throughout a creature's body.
|
|
|
nervous system
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A system of sensitive cells that responds to stimuli such as sound, touch, and taste.
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ganglia
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masses of nerve cell bodies
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hermaphrodite
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Possessing both the male and female reproductive organs.
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regeneration
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The ability to regrow a missing part of the body.
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|
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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 respiration.
|
|
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shell
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A tough, multilayered structure secreted by the mantle, generally used for protection, but sometimes for body support.
|
|
|
visceral hump
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A hump that contains a mollusk's heart, digestive, and excretory organs
|
|
|
foot
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A muscular organ that is used for locomotion and takes a variety of forms depending on the animal.
|
|
|
radula
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An organ covered with teeth that mollusks use to scrape food into their mouths.
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univalve
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An organism with a single shell.
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bivalve
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An organism with two shells.
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