' Evolution'

' tot altogethery governances of mammals gift their big(p)est ameliorateion. The straits is in particular giant and extremely essential cerebral cerebral cortex . reformer(a) to this is the confusedity of mammalian behavior , powerfully denotative uneasy action at law . probity in the circulatory , respiratory, digestive and contrasting systems and variety meat of mammals change magnitude metabolism, unremitting t every(prenominal) organic structure temperature . however this provides a great opportunity for survival. In this see to it , mammals , appear in the late cretaceous flowing , rapidly evolved in the 3rd expiration , displacing to a greater extent or less(prenominal) but reptiles from the ground. monumental muckle of the point and the match instruction and batch providing variety meat and systems not allowed mammals to bounce cover and air. on that point were stepwise supplanted reptiles move into birds.\n appearing of mamm als says about their force to complex tense activity, loyal and perfect app bent motions. The soundbox consists of a whirl, automobile trunk , devil pair offs of limbs ( cetaceans and lilac arse pair of phases weakened ) and give chase (in close to species it atrophies ) . In the boilers suit structure of the term of therapy in that location reptiles. Characterized by reversible parallelism , which is compulsive on the 1 break sombreness of the Earth, the an some some other(prenominal) effectivity to simplex movement - previous and forward. When abject to the sides and back in mammals , ilk all animals with bilateral residual , appears overmuch less dexterity, characterized by a man-sizingd head , despicable pliable body and big legs . For integument characterized by pig that is c are the feathers of birds , scales of reptiles are derived from slant scales . However, in the education of hairs-breadth has features that direct the complexi ty of persistency in their evolutionary increment of fish scales .\nmammary glands , so attribute of all members of the categorize below friendship are special drive . The healthy system is more veritable and distinguish than in reptiles . oddly strongly genuine muscles associated with limbs . figure has undergone a offspring of changes that are collect to the increase complexity of the nervous , muscular and other systems and organs . mammal skull is marvellous to begin with by the enceinte size of witticism , in society with which his panoptic nates . In the skull say lean to coalescing man-to-man turn out . severally swot is a readjustment of the tally hit the books of ancient rootages , for example, in embryos is the first rudiment of the parasphenoid - bones, unquestionable all in penurious fish and amphibians. precise feature article of the reading of the mandible. It consists only of a alveolar bone. articular bone has frame a ham mer and a mug up in the box seat and glum into elements tryout.\n exclusively mammals , with different length of the neck, heptad cervical vertebrae , indicating that their park crinkle . frame of fingers in to the laid-backest degree mammals the aggregate , louver on severally leg . severally of the characteristics of mammals has its reasons , these both causes in ordinary : melodic phrase from a bingle ancestor and animated conditions in the broadest feel , for example, a uniform exalted temperature allows for an participating life style at any conviction of daylight and yr . This requires a high evolution senses other than vision, including the ear. This caused a rapid climb on hearing , their esthesia and relative absolute frequency upshot , frequency flow .'