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Semester Vocab
vocabulary
| Term | Definition |
|---|---|
| Blastula | Fluid-filled ball of cells formed by mitotic cell division of the embryo |
| Gastrula | two-cell layer sac with an opening at one end that forms from the blastula during embryonic development |
| Deuterostome | Coelomate animal whose anus develops from the opening in the gastrula |
| Protostome | Coelomate animal whose mouth develops from the opening in the gastrula |
| Closed Circulatory System | Blood is confined to the vessels as it moves through the body |
| Open Circulatory System | blood is pumped out of vessels into open spaces surrounding body organs |
| Crop | Sac in which food and soil are stored until they pass to the earthworm's gizzard |
| Gizzard | muscular sac in birds that contains hard particles that help grind soil and food before they pass into the intestines |
| Nephridium | structure through which most molluks eleiminate metabolic wates from cellular processes |
| Book Lung | In spiders and some other arthropods, the respiratory structure with highly folded walls whose membranes look like book pages |
| Spiracle | opening in the arthropod body through which air enters and waste gases leave |
| Tracheal Tube | in most terrestrial arthropods, one of a system of tubes that branch into smaller tubules and carry oxygen throughout the body |
| Chordate | Animal of the phylum chordata having a dorsal tubular nerve cord, a notochord, pharyngeal pouches, and a postanal tail at some point in its development |
| Invertebrate Chordate | chordate without a backbone |
| Water Vascular System | system of fluid-filled , closed tubes that allow echinoderms to control movement and get food |
| Nephron | filtering unit of the kidney |
| Operculum | movable, protective flap that covers a fish's gills and helps to pump water that enter the mouth and moves over the gills |
| Scale | small, flat, platelike structure near the surface of the skin of most fishes; can be ctenoid, cycloid, placoid, or ganoid |
| Spawning | process by which male and female fishes release their gametes near each other in the water |
| Swim Bladder | gas-filled internal space in bony fishes that allows them to regulate their buoyancy |
Created by:
Emmelee
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