General Characteristics of Amphibia | Dr.BGR Publications

Amphibians' skin is soft without scales.

1. General Characteristics of Amphibia Dr. BGR

2. Agenda Introduction Key Characteristics General Characteristics Example Summary

3. Scientific Classification Kingdom: Animalia Note All animals are members of the Animalia Phylum:  Chordata C hordate: animal of the phylum Chordata

4. Habitat live both on land & in water Note Habitat : Natural environment of an animal

5. ectothermic animals Ectotherm: any  so-called cold-blooded animal

6. body divided into head & trunk tail may / may not be present Note

7. skin smooth rough without any scales, but with glands that make it moist

8. limbs two pairs for locomotion

9. Respiration respire through the lungs & skin. Gills might be present externally in some adults

10. liver Present well developed

11. circulatory system / C ardiovascular system Heart: three chambered blood contains RBC. They are nucleated 2 auricles & 1 ventricle Note

12. kidney kidneys are mesonephric excretory material includes ammonia and urea Urinary bladder is present Note

13. Central nervous system  (CNS) well developed. The brain occupies completely the cranial cavity. The brain is divided into fore, mid & hind brains. Brain continuous as spinal cord

14. Reproduction sexes are separate fertilization is usually external. in salamanders, the fertilization is internal Male & female can be identified: Sexual dimorphism Note

15. Development indirect with metamorphosis

16. Breeding occurs in water. copulatory organs are absent in males

17. Example Frogs, Salamanders

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