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Reptiles, Birds, and Mammals are Amniotes Have a membranous sac called the  amnion  that surrounds &  protects the embryo
Three characteristics of amniotes decrease their dependency on water 1.  Amniotic egg  – waterproof egg with a covering – ...
2.  Internal fertilization  – male deposits sperm within the  reproductive system 3.  Water-tight skin  – made out of a pr...
Endotherm Ectotherm -”regulator” -”conformer” -temperature stays constant -temperature changes with  -birds, mammals  exte...
Reptiles  (Class Reptilia)‏ Turtles, lizards, snakes, crocodiles, alligators Water-tight skin is made out of  scales  – ha...
 
Birds (Class Aves) are endothermic amniotes  with specialized adaptations for flight Evolved from small dinosaurs
Because birds are endotherms, they lay eggs that must be kept  warm  by  brooding Song Sparrow brood patch
Special adaptations for flight: 1.  Wing shape  – produces lift for flight
2.  Feathers  –  modified  scales –  function in flight, waterproofing, and endothermy
3.  Air sacs  – function with lungs in respiration –  needed to meet intense oxygen demands for flight –  reduces body den...
4.  Honeycombed bones makes lighter Bird bone (much lighter)‏ Human bone
5.  No teeth to reduce weight of head -instead they have a  gizzard , a muscular organ that  grinds food
Structure fits Function – Beak Shape
Arguably the Most   Exquisitely   Evolved Mating Behaviors Belong to Class Aves
 
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Phylum Chordata - Class Reptilia, Aves, and Mammalia

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Phylum Chordata - Class Reptilia, Aves, and Mammalia

  1. 1. Reptiles, Birds, and Mammals are Amniotes Have a membranous sac called the amnion that surrounds & protects the embryo
  2. 2. Three characteristics of amniotes decrease their dependency on water 1. Amniotic egg – waterproof egg with a covering – inside the egg is a fluid-filled cavity in which the embryo develops
  3. 3. 2. Internal fertilization – male deposits sperm within the reproductive system 3. Water-tight skin – made out of a protein called keratin ; prevents dehydration & acts as a barrier May be hair, nails, scales, or feathers
  4. 4. Endotherm Ectotherm -”regulator” -”conformer” -temperature stays constant -temperature changes with -birds, mammals external environment -reptiles, amphibians, fish
  5. 5. Reptiles (Class Reptilia)‏ Turtles, lizards, snakes, crocodiles, alligators Water-tight skin is made out of scales – hard, overlapping layers of protein Scales cannot expand, so to grow bigger a reptile must molt Most lay eggs, but some give birth to live young
  6. 7. Birds (Class Aves) are endothermic amniotes with specialized adaptations for flight Evolved from small dinosaurs
  7. 8. Because birds are endotherms, they lay eggs that must be kept warm by brooding Song Sparrow brood patch
  8. 9. Special adaptations for flight: 1. Wing shape – produces lift for flight
  9. 10. 2. Feathers – modified scales – function in flight, waterproofing, and endothermy
  10. 11. 3. Air sacs – function with lungs in respiration – needed to meet intense oxygen demands for flight – reduces body density (makes it lighter for flight)‏
  11. 12. 4. Honeycombed bones makes lighter Bird bone (much lighter)‏ Human bone
  12. 13. 5. No teeth to reduce weight of head -instead they have a gizzard , a muscular organ that grinds food
  13. 14. Structure fits Function – Beak Shape
  14. 15. Arguably the Most Exquisitely Evolved Mating Behaviors Belong to Class Aves

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