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Chordata: Amphibans, Reptiles, and Birds William Ross Jeff.

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Presentation on theme: "Chordata: Amphibans, Reptiles, and Birds William Ross Jeff."— Presentation transcript:

1 Chordata: Amphibans, Reptiles, and Birds William Ross Jeff

2 Common Characteristics Body cavity: All are coelomates Body cavity: All are coelomates Body symmetry: Bilaterally symmetrical Body symmetry: Bilaterally symmetrical Nervous system: Have spinal cords with vertebrae and brains Nervous system: Have spinal cords with vertebrae and brains Circulatory system: Circulatory system: Amphibians and Reptiles are Ectothermic Amphibians and Reptiles are Ectothermic Birds are Endothermic Birds are Endothermic Digestive system / Excretory system: One way digestive track Digestive system / Excretory system: One way digestive track

3 Common Characteristics Locomotion/Musculature: Ambibans, Amniotes (Reptiles and Birds included) are Tetrapods Locomotion/Musculature: Ambibans, Amniotes (Reptiles and Birds included) are Tetrapods Skeletal type: Mineralized endoskeletons (in reptiles and birds) Skeletal type: Mineralized endoskeletons (in reptiles and birds)

4 Amphibians Class Amphibia Class Amphibia Order Urodela Order Urodela Salamanders Salamanders Order Anura Order Anura Frogs Frogs seaman.com/Travel/CzechRepublic/Wildlife/CzechSalamander.jpg Order Apoda Order Apoda e/Plains%20Leopard%20Frog.jpg

5 Amphibians Derived Characteristics: Derived Characteristics: Most have dual lives Most have dual lives Aquatic Larval stage Aquatic Larval stage Adult land dwelling stage Adult land dwelling stage Most live in damp habits Most live in damp habits e/Plains%20Leopard%20Frog.jpg seaman.com/Travel/CzechRepublic/Wildlife/CzechSalamander.jpg like swamps and rain forests Some Amphibians only breathe through skin and oral cavity Some Amphibians only breathe through skin and oral cavity

6 Amphibians Sample Organisms: Sample Organisms: Rana blairi (Plains Leopard Frog) Rana blairi (Plains Leopard Frog) e/Plains%20Leopard%20Frog.jpg seaman.com/Travel/CzechRepublic/Wildlife/CzechSalamander.jpg Salamandra salamandra (Fire Salamander) Salamandra salamandra (Fire Salamander)

7 Reptiles Class Reptilla Class Reptilla Crocodilia Crocodilia Crocodiles and Alligators Crocodiles and Alligators Sphenodontia Sphenodontia Tuataras Tuataras -horned_lizard_babies_mom_0805.jpg Squamata Squamata Lizards and Snakes Lizards and Snakes Testudines Testudines Turtles and Tortoises Turtles and Tortoises

8 Reptiles Ammonites: named for their amniotic eggs Ammonites: named for their amniotic eggs Derived Characteristics: Derived Characteristics: Waterproof Scales made of β – Keratin Waterproof Scales made of β – Keratin Other characteristics are highly derived Other characteristics are highly derived -horned_lizard_babies_mom_0805.jpg

9 Reptiles Ammonites: named for their amniotic eggs Ammonites: named for their amniotic eggs Sample Organisms: Sample Organisms: Phrynosoma douglasii (Short-horned Horned Lizard) Phrynosoma douglasii (Short-horned Horned Lizard) Ophiophagus hannah (King Corba) Ophiophagus hannah (King Corba) -horned_lizard_babies_mom_0805.jpg

10 Birds Class Aves Class Aves Nearly a dozen surviving modern orders Nearly a dozen surviving modern orders content/uploads/Emperor_Penguin.jpg flameback-nepal-2008.jpg

11 Birds Derived Characteristics: Derived Characteristics: Adoptions for flight: Adoptions for flight: No urinary bladder No urinary bladder Often one ovary in females Often one ovary in females No teeth No teeth Air filled honey-combed wings Air filled honey-combed wings content/uploads/Emperor_Penguin.jpg flameback-nepal-2008.jpg Feathers contain Feathers contain β – Keratin like scales

12 Birds Sample Organisms: Sample Organisms: Dinopium benghalense Dinopium benghalense (Black- Rumped Flameback) Aptenodytes forsteri (Emperor Penguin) content/uploads/Emperor_Peng uin.jpg flameback-nepal-2008.jpg

13 Contrasts Sensory structures/features: Sensory structures/features: All have developed eyes and ears but All have developed eyes and ears but Birds have the best eyesight of the vertebrates Birds have the best eyesight of the vertebrates Reproduction: Reproduction: Amphibians most have aquatic external fertilization Amphibians most have aquatic external fertilization Reptiles and birds have internal fertilization and lay amniotic eggs Reptiles and birds have internal fertilization and lay amniotic eggs Which contain extrambryonic membranes Which contain extrambryonic membranes

14 kentsimmons.uwinnipeg.ca/16cm05/1116/34-19-AmnioticEgg-L.gif

15 Contrasts Gas exchange Gas exchange Most larval amphibians use gills and most adult amphibians rely on moist skin for gas exchange Most larval amphibians use gills and most adult amphibians rely on moist skin for gas exchange Most reptiles (except Turtles) use lungs as scales prevent breathing through skin Most reptiles (except Turtles) use lungs as scales prevent breathing through skin Turtles can use moist surfaces of their cloaca for gas exchange Turtles can use moist surfaces of their cloaca for gas exchange Birds rely on lungs Birds rely on lungs

16 Are You Ready? Quiz Time!

17 Question 1 As opposed to Reptiles and Amphibians, only Birds As opposed to Reptiles and Amphibians, only Birds A. Are ectothermic A. Are ectothermic B. Have β – Keratin B. Have β – Keratin C. Are endothermic C. Are endothermic D. Both B and C D. Both B and C

18 Question 1 As opposed to Reptiles and Amphibians, only Birds As opposed to Reptiles and Amphibians, only Birds A. Are ectothermic A. Are ectothermic B. Have β – Keratin B. Have β – Keratin C. Are endothermic C. Are endothermic D. Both B and C D. Both B and C Correct Answer: C Correct Answer: C

19 Question 2 Compared with Birds and Reptiles Amphibians Compared with Birds and Reptiles Amphibians A. Can still live in aquatic environments A. Can still live in aquatic environments B. Breath solely with their oral cavity B. Breath solely with their oral cavity C. Breath through their skin C. Breath through their skin D. Have internal fertilization D. Have internal fertilization

20 Question 2 Compared with Birds and Reptiles Amphibians Compared with Birds and Reptiles Amphibians A. Can still live in aquatic environments A. Can still live in aquatic environments B. Breath solely with their oral cavity B. Breath solely with their oral cavity C. Breath through their skin C. Breath through their skin D. Have internal fertilization D. Have internal fertilization Correct Answer: C Correct Answer: C

21 Question 3 What do reptiles and birds share in common? What do reptiles and birds share in common? A. β – Keratin A. β – Keratin B. Amniotic eggs B. Amniotic eggs C. Both are tetrapods C. Both are tetrapods D. All of the above D. All of the above

22 Question 3 What do reptiles and birds share in common? What do reptiles and birds share in common? A. β – Keratin A. β – Keratin B. Amniotic eggs B. Amniotic eggs C. Both are tetrapods C. Both are tetrapods D. All of the above D. All of the above Correct Answer: D Correct Answer: D

23 Question 4 Which of the following is not an adaptation for flight in birds Which of the following is not an adaptation for flight in birds A. Honey combed wings A. Honey combed wings B. No teeth B. No teeth C. No urinary bladder C. No urinary bladder D. None of the above D. None of the above

24 Question 4 Which of the following is not an adaptation for flight in birds Which of the following is not an adaptation for flight in birds A. Honey combed wings A. Honey combed wings B. No teeth B. No teeth C. No urinary bladder C. No urinary bladder D. None of the above D. None of the above Correct Answer: D Correct Answer: D

25 Thank You


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