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Ch14 Vertebrates
Ectothermic Vertebrates
| Question | Answer |
|---|---|
| Chordates | animals that have 4 stages in their development |
| notochord | flexible but firm covering that turns into the vertebra |
| postanal tail | muscular structure at the end of the notochord |
| nerve cord | turns into the spinal cord & brain |
| pharyngeal pouches | found near the mouth and turns in to gills or Eustachian tube. |
| endoskeleton | internal skeleton in vertebrates |
| cartilage | flexible tissue found at the ends of all bones |
| vertebrae | backbones that protect the spinal cord |
| ectotherm | body temperature is controlled from outside the body |
| endotherm | body temperature is controlled from inside the body in the brain |
| fins | fanlike structures that help fish move |
| scales | hard thin plates that cover the skin of a fish |
| gills | exchange carbon dioxide and oxygen in fish |
| internal fertilization | when the eggs are fertilized on the inside of the female's body. |
| external fertilization | fertilizing the egg with sperm outside the female's body |
| spawning | when female fish lays eggs and the male fish sprays sperm over the eggs. |
| swim bladder | air sac that allows the fish to sink or float upward in the water |
| jawless fish | lampreys and hagfish that have a round mouth & have tubelike bodies made of cartilage. |
| jawed cartilaginous fish | sharks, skates & rays that have jaws but their endoskeleton is made of cartilage. |
| bony fish | make up 95% of all fish and have bones. |
| lobe-finned fish | type of bony fish that have fleshy, lobe-like fins. |
| lungfish | fish that have gills and one lung to live in shallow water |
| ray-finned fish | make up most bony fish with long thin bones covered fins |
| hibernation | a period of inactivity during cold weather. |
| estivation | a period of inactivity during hot dry weather. |
| amphibians | ectothermic animals with wet smooth skin includes frogs, toads, & salamanders; means "double life" |
| reptiles | ectothermic animals with lungs dry scaly skin; includes turtles, snakes, alligators & lizards |
| amniotic egg | hard shelled eggs that are laid on land and all the embryo to develop. |
| alligator | have a broad, flat snout with a rounded end |
| crocodiles | have a narrow,pointed snout |
| gavials | have a slender with a bulb-type growth at the end. |
Created by:
hubblep
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