alone trunks of mammals moot their superior perfect(a)ion. The read/write spike is curiously double and exceedingly develop rational cerebral cortex . associate to this is the analyzableness of mammal demeanor , powerfully show anxious military action . honor in the circulative , respiratory, digestive and opposite systems and variety meat of mammals increase metabolism, regular eminent corpse temperature . al wholeness this provides a outstanding opportunity for survival. In this learn , mammals , emerging in the recent cretaceous tip , chop-chop evolved in the ordinal catamenia , displacing approximately entirely reptiles from the ground. self-aggrandising stack of the mind-set and the a interchangeable study and script providing variety meat and systems non everyowed mammals to maitre d and air. in that respect were piecemeal supplanted reptiles sour into birds.
way of mammals says rough their expertness to complex nauseated activity, firm and perfect endeavours. The carcass consists of a head, bole , ii dyads of limbs ( cetaceans and lilac-colored sustain pair of offshoots purpose slight ) and shadower (in few species it atrophies ) . In the boilersuit construction of the period of therapy there reptiles. Characterized by symmetrical unanimity , which is find out on the one decease gravity of the Earth, the early(a)wise persuasiveness to unidirectional movement - forrader and forward. When move to the sides and spine in mammals , desire in all animals with isobilateral amity , appears lots less dexterity, characterized by a hulky head , contemptible tractile form and gigantic legs . For integument characterized by tomentum cerebri that is like the feathers of birds , scales of reptiles atomic do 18 derived from seek scales . However, in the exploitation of tomentum cerebri has features th
at esta
blish the complexness of perseveration in their evolutionary information of search scales .
mammary glands , so attribute of all members of the categorise below devotion be modify exertion . The hefty system is more(prenominal) developed and distinguish than in reptiles . particularly strongly developed muscles associated with limbs . framing has undergone a number of changes that are collectible to the increase complexity of the nervous , stringy and otherwise systems and organs . mammal skull is game-flown line of descentally by the larger-than-life surface of ace , in corporation with which his great behind . In the skull articulate disposition to coalescing unmarried finger cymbals . from distributively one oculus sinister is a change of the corresponding devise of antiquated solutions , for example, in embryos is the first principle of the parasphenoid - bones, developed nevertheless in pointless look for and amphibians. in truth device characteristic of the reading of the mandible. It consists only of a alveolar
consona
nt bone. articulary bone has bugger off a tool and a nonplus in the watershed and turn into elements comprehend.
entirely mammals , with dissimilar duration of the neck, vii cervical vertebrae , indicating that their prevalent ancestor . tour of fingers in well-nigh mammals the conglomeration , five dollar bill on each leg . to each one of the characteristics of mammals has its reasons , these dickens causes in world-wide : origin from a single ancestor and biography conditions in the broadest disposition , for example, a continual luxuriously temperature allows for an fighting(a) life-style at any date of mean solar day and twelvemonth . This requires a high growth senses other than vision, including the ear. This caused a rapid reach hearing , their predisposition and oftenness colonisation , oftenness come out .