1 / 39

Chordate Animals

Chordate Animals. Phylum Chordata. Phylum Chordata. Notochord Gill slits Dorsal hollow nerve cord Post anal tail. Fish. Gills Extract oxygen from water Fins for swimming. Lobed-Fins (Muscles). Evolution of Amphibians. Transitional Tetrapods.

cbarnhill
Download Presentation

Chordate Animals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chordate Animals

  2. Phylum Chordata

  3. Phylum Chordata • Notochord • Gill slits • Dorsal hollow nerve cord • Post anal tail

  4. Fish • Gills • Extract oxygen from water • Fins for swimming

  5. Lobed-Fins(Muscles)

  6. Evolution of Amphibians

  7. Transitional Tetrapods Skull, teeth, limbs similar to lobe-finned fish Acanthostega Ichthyostega

  8. Amphibians • Moist skin • Must return to water to reproduce

  9. Class Reptilia • Scales • Amniotic egg

  10. Reptiles • Peg like teeth

  11. Reptiles • First animals to live away from water

  12. Amniotic Egg

  13. Reptile Chorion Oxygen from air Amnion Provides private pond Yolk Sac Food for embryo Allantois Store urinary waste Mammal Chorion Form placenta to get oxygen & food from mothers blood Amnion Provides private pond Yolk sac Temporarily make RBCs Allantois Form umbilical cord Evolution of Placenta from Amniotic Egg

  14. Birds • Feathers • No teeth • Scales on legs • Bones with air spaces

  15. Adaptations for Flight • Honey combed bones • Air cavities • Less weight

  16. Light Weight Skeleton • Frigate bird • 7 foot wing span • 4 ounce skeleton

  17. Adaptations for Flight • Enlarged sternum • Flight muscle attachment • Long neck • balance

  18. Migration • Sissor-tailed flycatchar • Migates to Central and South America in October • Returns in April

  19. Migration • Arctic tern • Migrates 25,000 miles!

  20. Benefits of Birds to Man • Eat insects, rodents and weeds • Spread seeds for flowers and trees • Food • Sport • Pets

  21. Fastest Animal • Peregrine falcon • Strikes prey at 180 mph

  22. Elephant Bird • Eleven feet tall • 1100 pounds • Largest egg ever • Extinct in late 1600’s

  23. Caudipteryx • Feathered dinosaur • Flightless • Transitional fossil • Dinosaur arms • Dinosaur teeth • Only front of upper jaw • Bird feathers

  24. Archaeopteryx • 147 MYA • Jurassic Period • Transitional fossil • Characteristics of reptiles • Characteristics of birds

  25. Archeopteryx • Reptile characteristics • Teeth • Boney tail • Fingers with claws • Bird characteristics • feathers

  26. Class Mammalia • Hair • Mammary glands • Sweat glands • Specialized teeth

  27. Reptile Ancestor • Reptiles from Pennsylvanian and Permian • 300-245 MYA • Body close to ground • Legs away from body • Canine like teeth Dimetron

  28. Early Mammals • Triassic • 220 MYA • Small

  29. Basic Mammal

  30. Monotremes • Lay eggs • Incubate 12 days • Lick milk from mothers fur • Transitional species

  31. Marsupials • Pouched mammals • Birth to tiny embryo • Embryo attaches to mother’s nipple to complete development

  32. Placental Mammals • Placenta nourishes embryo • Long gestation period • 22 months for elephant • Most successful group of mammals

  33. Placental Mammals • Competitive advantage over monotremes and marsupials • Better nutrition from placenta • Less vulnerable to predators • More advanced at birth

  34. The End

More Related