Module 11 Definitions
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Module 11 Definitions
Biology Definitions Module Apologia
Module 11 Definitions in Apologia
Animals that lack a backbone.
Animals that possess a backbone.
An organism possess shperical symmetry if it can be cut into two identical halfs by any cut that runs through the organisms center.
An organism possess radial symmetry if it can be cut into two identical halfs by any longitudinal cut through it's center.
An organism posses bilateral symmetry if it can only be cut into two identical halfs by a single longitudinal cut along it's center which divides it into right and left halfs.
An outer layer of cells design to provide protection.
The jelly-like substance that separates the epidermis from the inner cells in a sponge.
Flagellated cells that pump water into a sponge.
Cells in a sponge that perform digestion and transport functions.
A cluster of cells incased in a hard spicule-reinfored shell.
A sessile tubular cnidarian with a mouth and tentacles at one end, and a basal disc at the other.
A free swimming cnidarian with a bell shaped body and tentacles
Animal tissue consisting of one or more layers of cells that have only one free surface, because the other suface adheres to a membrane or other substance.
The jelly-like substance that separates the epithelial cells in a cnidarian.
Small capsules that contain a toxin that is injected into prey or preditors.
The organ that produces sperm.
The organ that produces eggs.
The end of an animal that contains it's head.
The end of an animal that contains the tail.
A system designed to transport food and other necassary substances throughout a creatures body.
A system of sensitive cells that respond to stimuli such as sound, touch, and taste.
Masses of nurve cell bodies.
Possessing both the male and the female reproductive organs.
The ability to regrow a missing part of a body.
A sheath of tissue that incloses the vital organs of a mollusk, makes the mollucks cell, and preforms resporation.
The tough, multilayered structure secreted by the mantle. It it usual used for protection, but sometimes for body support.
A hump that contains a mollusks heart, digestive, and excretory organs.
A muscular organ that is used for locomotion and takes a veriaty of forms depending on the animal.
An organ covered with teeth that mollusks use to scrape food into their mouths.
An organism with a single shell.
An organism with two shells.