Mammals(Mammalia scientificLatin) are a class ofvertebrate animals, which are characterized by the presence ofmammary glandsin femalesproducemilk tofeedyoung(oryoung), and the presence offur orhair.They areendothermic animals(ie, constant temperature, also known as "warm-blooded animals"). The braincontrols body temperatureand circulatory system,including the heart(fourchambers). Mammalsinclude5,416species (including humans), distributed in about1,200genera,152familiesand 46orders, according to the compendiumpublished byWilson andReeder(2005).Howevernew species arediscovered each year, increasing that number, and by the end of2007, the number was5,558species ofmammals.
Mammals (Mammalia scientific Latin) are a class of vertebrate animals, which are characterized by the presence of mammary glands in females produce milk to feed young (or young), and the presence of fur or hair. They are endothermic animals (ie, constant temperature, also known as "warm-blooded animals"). The braincontrols body temperature and circulatory system, including the heart (four chambers). Mammals include 5,416 species (including humans), distributed in about 1,200 genera, 152 families and 46orders, according to the compendium published by Wilson andReeder (2005). However new species are discovered each year, increasing that number, and by the end of 2007, the number was5,558 species of mammals.
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