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Mammalia

Chordata

         Phyla

 

Reptilia (turtles, lizards, snakes)

  • Babies are fed with milk from mammary glands

  • Most mammals have hair/fur

  • Jaw is hinged from skull

  • Diaphragm separarates heart and lungs from abdominal cavity

  • Red blood cells do not have nucleus

  • Great variety in size, habitats, etc

  • Estimated 5,000 species

  • Four chambered heart

 

 

 

Amphibia

  • Aquatic and terrestrial habitats

  • More than 6,500 species

  • Moist skin

  • Rely a lot on cutaneous respiration

  • Doube channeled hearing system

  • two part teeth

  • Lay eggs

 

 

Cartilaginous Fishes

  • Skeleton mostly made of carilage

  • Mostly marine fishes

  • Live in shallow waters

  • Respiration occurs through gills

  • Internal fertilization

  • Use fins and tails to swim

 

 

  • Air-breathing vertebrates

  • Internal fertilization

  • Amniotic development

  • Epiderman scales

Agnatha

  • Jawless fish

  • Soft-skinned

  • Scaleless

  • Close to cylindrical 

  • Single nostril

  • Caudal fin around the tail 

  • Pouchlike gills that open through pores

  •  

 

 

Aves

 

  • 9,600 species

  • Have feathers

  • Wings

  • Warm blooded

  • Four chambered heart

  • Hard shelled eggs

  • Good vision, the sense they rely the most on

  • Sexual reproduction

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