Heller u05a2

570 views

Published on

Overview of Chordate classes and general characteristics

Published in: Health & Medicine, Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
570
On SlideShare
0
From Embeds
0
Number of Embeds
5
Actions
Shares
0
Downloads
0
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Heller u05a2

  1. 1. Overview of Phylum Chordata<br />Essential Question: What characteristics to all chordates have in common? <br />Essential Question: What classes of animals make up phylum Chordata? <br />
  2. 2. 4 Characteristics of Chordate Embryos<br /><ul><li>Dorsal hollow nerve cord – becomes the spinal cord
  3. 3. Notochord – becomes the backbone in most chordates
  4. 4. Pharyngeal pouches – develop into gills in fish; inner ear in other chordates
  5. 5. Post-anal tail – many chordates maintain tail</li></li></ul><li>Class: Agnatha “Jawless Fish”<br />Maintain notochord<br />No scales or fins<br />No jaws<br />Hard plates in mouth<br />Carnivores or parasites<br />Gills<br />Marine & fresh water<br />Ectotherm<br />
  6. 6. Class: Condrichythes “Sharks, Rays & Skates”<br />Skeleton of cartilage<br />Paired fins<br />Most are carnivores; some filter feeders<br />Placoid scales<br />Teeth that point inward<br />Gills<br />All marine<br />Ectotherm<br />
  7. 7. Class: Osteichthyes “Bony Fish”<br />Paired fins & scales<br />Swim bladder<br />Chromatophores<br />Lateral Line<br />Gills<br />Marine & fresh water<br />Ectotherm<br />
  8. 8. Class: Amphibia “Frogs, Toads, Salamanders”<br />Metamorphosis<br />Larva = gills<br />Adults = lungs<br />3 chambered heart<br />Smooth skin<br />Cutaneous respiration<br />Ectotherm<br />
  9. 9. Class: Reptilia “Turtles, Snakes, Lizards”<br />Amniotic egg<br />Lungs only<br />Partially 4 chambered heart<br />Scales<br />Keratin<br />Many have toes, claws<br />Ectotherm<br />
  10. 10. Class: Aves “Birds”<br />Amniotic egg<br />Feathers<br />Beak<br />Crop<br />4 chambered heart<br />Migration<br />Endotherm<br />
  11. 11. Class: Mammalia “Horses, Dogs, Tapirs”<br />Hair<br />Placenta<br />Mammary Glands<br />Milk Production<br />4 chambered heart<br />Endotherm<br />
  12. 12. Take a moment – With your partner…<br />Discuss what characteristics would you expect the following animals to have?<br />

×