vertebrates
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Fish [class- Pisces]
Live in water They possess ,
»A streamlined body »Fins for locomotion»Gills for exchange of gases
Skin covered with scales.They have two chambered heartThey have variable Body temperature (Poikilothermic)
Cartilagous Fish
They have ,A skeleton of cartilageSeparate gills which are not covered
» Shark
Bony FishThey have ,
A skeleton with bonesGills covered with a bony plate
» Trout
Amphibians
Have smooth moist skinLungs and moist skin act as respiratory organsThree chambered heartAmphibians live the first part of their lives in water and the second part on landPoikilothermic
» frogs and toads,» salamanders
Reptiles
The animals first adapt to live on landThey have
Rough dry skin (The skin is covered with hard dry scales )Three chambered heart
Breathe via lungs Most of the Reptile have four legs some of them have no legs they are called snakes.Poikilothermic
Birds
The body is covered with feathersFront limbs are adapted as wingsPosses a beak Have a four chambered heart Have constant body temperature (homoiothermic)