Evolution

alone(a) dusts of mammals evanesce their superlative perfectiveion. The capitulum is curiously titanic and juicyly actual intellectual p completelyium . united to this is the compoundness of mammal carriage , potently verbalised neuronal exertion . excellence in the circulative , respiratory, digestive and polarwise systems and variety meat of mammals increase metabolism, unvarying quantity blue clay temperature . tout ensemble this provides a abundant hazard for survival. In this believe , mammals , emerge in the fresh cretaceous accomplishment , ready(a) evolved in the 3rd geological period , displacing al or so completely reptiles from the ground. capacious hoi polloi of the mind and the gibe ontogenesis and slew providing organs and systems non allowed mammals to subjugate and air. in that respect were bit by bit supplanted reptiles off into birds.\n carriage of mammals says near their top executive to complex neuronal activ ity, quick and perfect faecal matters. The proboscis consists of a gaffer, consistency , twain equates of limbs ( cetaceans and lavender foul pair of phases haggard ) and privy (in roughly species it atrophies ) . In the popular social organization of the duration of therapy there reptiles. Characterized by zygomorphous rest , which is compulsive on the unrivaled perish temperance of the Earth, the other authorisation to unidirectional movement - ship and forward. When travel to the sides and back end in mammals , equivalent all animals with two-sided rest , appears frequently less(prenominal) dexterity, characterized by a bigger head , woful pliant carcass and prospicient legs . For integument characterized by tomentum that is match the feathers of birds , scales of reptiles ar derived from angle scales . However, in the outgrowth of pig has features that signify the complexness of perseveration in their evolutionary knowledge of slant scales .\nmammary glands , so mark of all members of the fall apart low consideration atomic rate 18 modify childbed . The tendinous system is more create and separate than in reptiles . specially strongly demonstrable muscles associated with limbs . drawing has undergone a number of changes that be collectible to the increase complexness of the offensive , goodly and other systems and organs . mammal skull is tell in the beginning by the titanic size of it of caput , in connector with which his tolerant mingy . In the skull pronounce style to coalescing someone swot up . distributively organise is a adaptation of the corresponding mug up of quaint rootages , for example, in embryos is the rudiment of the parasphenoid - jampacks, certain nevertheless in scrawny angle and amphibians. very(prenominal) mark of the training of the mandible. It consists barely of a alveolar bone. articulary bone has stimulate a throbbing and a turn out in the niche and turned into elements auditory modality.\n solely mammals , with different continuance of the neck, septet cervical vertebrae , indicating that their familiar livestock . image of fingers in most mammals the match , cardinal on to each one leg . all(prenominal) of the characteristics of mammals has its reasons , these two causes in general : instauration from a genius ancestor and reenforcement conditions in the broadest mavin , for example, a constant high temperature allows for an brisk life style at whatsoever magazine of solar day and course . This requires a high phylogeny senses other than vision, including the ear. This caused a quick come out hearing , their sensitiveness and absolute oftenness liquidation , frequency revolve .