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Biology CH. 25
Vertebrate Diversity
| Term | Definition |
|---|---|
| Chordate | Any animal having, at some stage in development, a hollow nerve cord, pharyngeal slits, and tail. |
| Notochord | Flexible skeletal support rod embedded in an animal's back. |
| Endoskeleton | Internal skeleton built of bone or cartilage. |
| Gill | Respiratory organ of aquatic animals that allows breathing underwater. |
| Countercurrent Flow | Flow of water opposite that of the flow of blood in a fish's gills. |
| Lateral Line | Sensory system in fish that allows them to sense distant movements in the water. |
| Operculum | Protective bony plate that covers a fish's gills. |
| Ray-Fin | Fan shaped arrangement of bones in a fish's fin. |
| Swim Bladder | Buoyancy organ that helps fish to swim at different depths in the water. |
| Lobe-Fin | Paired limblike fin that is round in shape. |
| Tetrapod | Vertebrate with four limbs. |
| Amphibian | Vertebrate that can live on land and in water. |
| Tadpole | Aquatic larva of frogs or toads. |
| Amniote | Vertebrate whose embryo or fetus is enclosed by a thin, tough membranous sac. |
| Keratin | Protein that binds to lipids inside a skin cell, forming a waterproof layer within the skin. |
| Amniotic Egg | Waterproof container that allows an embryo to develop out of water and externally from the mother without drying out. |
| Placenta | Organ that develops in female mammals during pregnancy and carries nutrients from the mother to the embryo. |
Created by:
Mr.Devine
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