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6/3/15 Mr. Faia 6th Grade Science AMPHIBIANS FISH REVIEW Name the 3 types of fish. What are the skeletons made of for each type? What type of eaters are all cartilaginous fish? What is a swim bladder? What does a swim bladder do for a fish? What type of fish have a swim bladder? Define buoyant force. What percentage of fish are bony fish? Why do sharks have rows of teeth? Name the 2 types of jawless fish. Name the 3 types of cartilaginous fish. GILLS TO LUNGS Ectothermic vertebrate What does ectothermic mean? The early part of its life is spent in water Amphibian actually means “double life” GILLS TO LUNGS Most amphibians begin life in water Spend adulthood on land Return to water to reproduce What is this process called? GILLS TO LUNGS Amphibians lay their eggs in water Larvae live in water Have gills to breathe GILLS TO LUNGS Adults lose gills and acquire lungs Can also obtain oxygen and release carbon dioxide through the skin AMPHIBIAN CIRCULATION Amphibians have closed circulatory systems Different in larva and adults AMPHIBIAN CIRCULATION Larva have a single loop Like a fish Adults have a double loop AMPHIBIAN CIRCULATION Upper chambers of the heart are called atria Lower chamber is called the ventricle AMPHIBIAN CIRCULATION One atrium receives oxygen rich blood from the lungs The other gets oxygen poor blood from the body AMPHIBIAN CIRCULATION The ventricle pumps blood out to the lungs and body REPRODUCTION AND DEVELOPMENT All amphibians reproduce through sexual reproduction Amphibian eggs are coated in a clear jelly REPRODUCTION AND DEVELOPMENT Amphibians then go through metamorphosis after hatching GETTING AROUND ON LAND Adult amphibians have very strong skeletons Muscular limbs allow for movement on land GETTING AROUND ON LAND Eyes are adapted for land Transparent membrane to keep from drying out Have eyelids unlike fish Able to close their eyes Frogs and Toads Adapted for hopping and leaping Powerful muscles and bones in the hind legs REVIEW Are amphibians ectotherms or endotherms? What process do amphibians go through to reach adulthood? How do amphibians reproduce? Name the chambers of an amphibian’s heart. How many loops does a tadpoles circulatory system have? How many loops does an adult’s circulatory system have? What covers an amphibian’s eggs? How do amphibian larva breathe?
