Chapter 5
description
Transcript of Chapter 5
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Chapter 5
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Vertebrates
• Vertebrates are animals with an endoskeleton• Vertebrates have muscle, digestive,
respiratory, circulatory, and nervous systems, and sensory organs
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Fish
1) Have gills that pull oxygen out of water2) Have swim bladder3) Have sensory organs (lateral line)
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Jawless Fish
1) Slender tube-like shape2) No jaws but have teeth3) Digestive system with no stomach
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Cartilaginous Fish
1) Skeleton made of cartilage2) Includes sharks3) Include rays and skates
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Bony Fish
1) Skeleton made of hard bone2) Most have scales3) Have jaws and teeth and several pairs of fins
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Amphibians
1) Live some of life in water and some on land2) Lay eggs in water3) Obtain oxygen through smooth, moist skin
(some have lungs)
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Reptiles
1) Have tough dry skin covered with scales2) Have lungs and sensory organs adapted for
land3) Lay eggs with shells on land
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Birds
1) Have feathers and hollow bones for flying2) Have pair of scaly legs and a pair of wings
and a beak3) Hard shelled eggs need to be kept at a
constant temperature
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Mammals
1) Have hair during part of its life2) Most have specialized teeth3) Produce milk to feed young
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Definitions
Ectotherm – body temperatures change with environmental conditions (cold blooded)
Endotherm – maintains constant body temperature warm blooded
Gestation – time a mammal is developing in mother