Class-Amphibia

• CLASS-AMPHIBIA

  • Amphibia Gr. Amphi-Dual
  • Bios = life
  • Can live in aquatic as well as terrestrial habitats
  • Most have two pairs of limbs
  • Body divisible into head and trunk
  • Tail may be present in some
  • Neck is absent
  • Skin is moist and scaleless
  • Eyes have eyelids
  • Tympanum represents the ear
  • Alimentary canal, urinary and reproductive tracts open into a common chamber called cloaca which opens to the exterior
  • Respiration is by gills, lungs and through skin
  • Heart is three chambered (two auricles and one ventricle)
  • Cold-blooded animals
  • Sexes are separate
  • Fertilization is external
  • Oviparous
  • Indirect development
• Types of amphibians

  • Bufo (Toad)
  • Hyla (Tree frog)
  • Rana (Frog)
  • Ichthyophis (Limbless amphibian)
  • Salamandra (Salamander)
• They have three chambered heart with two atria and one ventricle.
• Their skin is moist, thin, and permeable to gases.
• Amphibians are cold blooded animals.
• Their respiratory system includes gills, lungs, and skin.
• The sexes are separate.
• They are cold-blooded animals.
• They can breathe through their skin, but they also use lungs or gills depending on whether they're tadpoles or adults.
• They can breathe through their skin.
• Amphibians include frogs, salamanders, hyla,Rana
• Most species lay eggs that hatch into tadpoles or larvae.
• Most amphibians lay their eggs in water or damp soil.
• Frogs have smooth skin that is moist to the touch.