Cold-blooded are the animals which cannot regulate their internal body temperature according to the required level and they keep on changing their temperature according to the changes in external environment temperature. Although Warm-blooded animals attempt to keep their internal body temperature maintained and does not change the same along with changes in external environment. For example, if it is colder outside, the body of Warm-blooded animals try to adapt according to the situation and … [Read more...]

Invertebrates lack the well- developed skeleton system, backbone, notochord as well nervous system whereas, Vertebrates constitutes, segmented, motile vertebral column together term as the spine, along with proper organized, nervous system, digestive system, gastrointestinal tract, respiratory system (which can be gills or lungs). All the animals present on earth are classified in two categories only, which are Invertebrates or Vertebrates. Though it is said that Vertebrates arose from … [Read more...]