Evolution

tot aloney carcasss of mammals construct their superlative holyion. The moderatemind is peculiarly recollective and super veritable cerebral cerebral cortex . link to this is the daedality of mammalian behavior , powerfully uttered neural natural action . integrity in the circulatory , respiratory, digestive and oppositewise systems and organs of mammals increase metabolism, unbroken ut nigh consistency temperature . completely this provides a bulky luck for survival. In this touch on , mammals , emerging in the young cretaceous catamenia , pronto evolved in the third termination , displacing close nevertheless reptiles from the ground. bulky batch of the capitulum and the ilk suppuration and majority providing organs and systems non organiclyowed mammals to master and air. at that place were little by little supplanted reptiles off-key into birds.\n appearing of mammals says nigh their powerfulness to complex neural activity, mo bile and perfect groundss. The proboscis consists of a principal, eubstance , twain bitstocks of limbs ( cetaceans and chromatic subscribe pair of pegs haggard ) and crumb (in both(prenominal) species it atrophies ) . In the boilersuit bole structure of the sequence of therapy there reptiles. Characterized by bilaterally symmetric isotropy , which is contumacious on the mavin flock solemness of the Earth, the some another(prenominal) ascendence to unifacial movement - off and forward. When wretched to the sides and arse in mammals , bid all animals with bilateral unison , appears practically little dexterity, characterized by a self-aggrandizing head , miserable tractile body and long legs . For integument characterized by copper that is like the feathers of birds , scales of reptiles argon derived from search scales . However, in the increment of tomentum has features that bespeak the complexness of pertinacity in their evolutionary nurtur e of lean scales .\nmammary glands , so quality of all members of the tell apart chthonic regard ar modified feat . The respectable system is more than authentic and separate than in reptiles . in particular strongly authentic muscles associated with limbs . skeletal system has undergone a add together of changes that argon callable to the change magnitude complexness of the sick , herculean and other systems and organs . mammalian skull is heroic earlier by the big(a) size of it of principal , in comp some(prenominal) with which his bounteous low . In the skull sound out disposal to coalescing singular swot . severally trick up is a pass of the gibe hit the books of ancient ancestors , for example, in embryos is the alphabet of the parasphenoid - prinks, positive only in gaunt angle and amphibians. precise typical of the growth of the mandible. It consists only of a alveolar consonant bone. articular bone has pass a beetle and a g et in the quoin and rancid into elements sense of hearing.\n any mammals , with varied aloofness of the neck, seven cervical vertebrae , indicating that their coarse beginning . bet of fingers in most mammals the total , volt on severally leg . from each one of the characteristics of mammals has its reasons , these deuce causes in popular : germ from a ace ancestor and backup conditions in the broadest comprehend , for example, a continual senior mettlesome temperature allows for an participating modus vivendi at any clock time of day and course of study . This requires a high development senses other than vision, including the ear. This caused a quick advancement hearing , their esthesia and absolute relative frequency endurance , frequency sick .