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LIFE SCI: INVTBRTS1
Life Science: Invertebrates 1
| Term | Definition |
|---|---|
| Invertebrate | An animal without a backbone. |
| Spongin | A fibrous protein that functions like a skeleton in certain sponges. |
| Spicule | Sharp pointed structures in spongin made of calcium carbonate. |
| Filter Feeder | An organism that obtains food from water circulating through its body. |
| Nematocyst | A type of stinging cell possessed by certain cnidarians; used for defense or paralyzing prey. |
| Bilateral Symmetry | Symmetry in which one plane divides a structure in half from top to bottom. |
| Radial Symmetry | Symmetry in which several different planes can divide a structure in half through the center. |
| Neuron | A long thin cell that carries impulses. |
| Nerve | A bundle of neurons arranged side by side and wrapped in a protective covering. |
| Ganglion | A mass of nerve tissues; sometimes called a simple brain. |
| Stimulus | Anything that causes a response in an organism. |
| Sensory Receptor | A structure capable of receiving stimulus from the environment. |
| Circulatory System | A system of transporting blood throughout an organism. |
| Aortic Arches | Organs that help control blood pressure in earthworms. |
| Water Vascular System | A series of canals and tubules in echinoderms used for feeding and movement. |
| Capillary | One of many SMALL blood vessels with walls one cell thick. |
| Vein | Larger blood vessels that carry blood to the heart (open). |
| Collar cells | Cells in a sponge with flagella to pump water. |
| Osculum | The opening in a sponge that excretes water and unused nutrients. |
| Free Living | An animal that does not live inside and is not living dependent to another animal. |
| Parasite | A living organism that lives within, obtains nutrition from , and harms another living organism. |
| Medusa | The freely-swimming, umbrella- or disk-shaped gelatinous form of Cnidarians. |
| Flagella | A long whip-like tail as a part of a cell. |
| Cilia | Short hair-like structures on cells. |
| Siphons | A tube which forces water through an organism for movement. |
| Nerve Net | A network of neurons apparently continuous with one another and conducting impulses in all directions. |
| Pharynx | The tube that extends from the mouth and connects to the digestive tract and respiratory tract. |
| Radula | A muscular ribbon in mollusks (other than bivalves) which scrapes for food with sharp teeth-like structures. |
| Crop | A pocket-like place where food is stored in earthworms prior to the gizzard. |
| Gizzard | The part of an earthworm's digestive tract that breaks down food by grinding it with muscles. |
| Porifea | Sponges |
| Cnidaria | Sea jellies, Corals, Anemones. |
| Platyhelminthes | Flat worms. |
| Nematoda | Round worms. |
| Mollusca | Mollusks - Snail, Clams, Octopus, Squids. |
| Annelida | Segmented worms. |
| Echinodermata | Sea stars, Urchins, Sand dollars. |
| Digestive glands | A group of tissues that produce enzymes for breaking down food. |
| Ring canal | The circular water tube that surrounds the esophagus of echinoderms. |
| Regenerate | Able to grow back. |
| Univalve | ONE piece shell. |
| Bivalve | TWO piece shell. |
| Gastrovascular cavity | An opening in the digestive system of a simple animal that breaks food down into the cellular level. |
| Polyp | A body form of a cnidarian, such as a hydra or coral, that is cylindrical in shape, has a mouth usually surrounded by tentacles at one end, and is often attached to something at the other end. |
Created by:
MsRobinG
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