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ATS-Science 7
Invertebrates Vocabulary
Term | Definition |
---|---|
Animal | A multicellular heterotroph whose cells lack cell walls |
Bilateral Symmetry | Body plan whose sides of the body mirror each other |
Radial Symmetry | Body plan whose body is organized around the center or the mouth |
Asymmetry | Has no symmetry or body plan |
Invertebrate | An animal that does not have a backbone |
Porifera | Phyla of sponges that are a sac of cells with many pores |
Innate behavior | An inherited behavior that does not depend on the environment or experience |
Learned behavior | A behavior that has been learned from experience |
Sexual reproduction | Reproduction involving two parents |
Asexual reproduction | Reproduction involving one parent |
Open Circulatory System | A circulatory system in which the fluid is not contained entirely within vessels |
Closed Circulatory System | A circulatory system in which blood circulates through vessels that form a closed loop |
Nematocysts | Stinging tentacles of a Cnidarian |
Cnidarian | Phyla of animals that have a central body cavity, one opening and tentacles that sting |
Regeneration | The ability of an organism to regrow lost body parts |
Metabolism | Creating energy from breaking down food |
Exoskeleton | A hard, external, supporting structure |
Endoskeleton | An internal skeleton made of bone or cartilage |
Hibernation | A period of inactivity and lowered body temperature some animals undergo in winter |
Estivation | A period of inactivity and lowered body temperature some animals undergo in summer |
Mollusk | An invertebrate with a soft body covered by a hard shell |
Ganglion | A mass of nerve cells |
Segment | An identical, or nearly identical, repeating body part |
Circadian Rhythm | A biological daily cycle |
Metamorphosis | A rapid change in the life cycle of animals from an immature to adult form |