AMPHIBIANS

AMPHIBIANS 

         - These are those animal having "dual mode of Life" . they can survive both water and land
- From evolutionary point of view these are first animal who comes on earth surfaces from water
- Their about 3,500 Total species found
- As they came in land certain modification are occur in this are
* Development of lungs
* Development of limbs
* scales on body surfaces get invisibled

@ Character :-

~ Having somewhat terrestial habitat
~ Skin Having Colour pigment called chromatophore
~ Having limbs for locomotion
~ they are Poikilothermal animal
~ Having three chambered heart
~ They developed lungs for respiration
~ They survive both in aquatic and terrestial condition
~ They have moist and Scaleless skin
~ Process like Eativation and Hibernation shown by this amphibian in unfavourable condition
~ External Fertilization occur
~ These animal respire by skin so moist skin always needed ,when skin become dry animal may die
~ these animal are always shed on shady places
~ These animal having loosely attached skin
~ Their eye have eye lids
~ Having inner ear tympanic membrane
~ These animal usually communicate usig airborne and seismic signals
~ some of animal in amphibian have Camouflage techique to protect them from other animal
~ these Animal also have vocal sac
~ These animal mainly are Nocturnal animal active at night
~ These animal Having Brain, Spinal cord etc
~ some of them have indirect development
~ Oviparous animal
~ Lung with buccopharyngeal cavity
~ 10 pair cranial nerve
~ Excrete urea