Mammal
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Mammals are the class of vertebrate animals characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and which have endothermic or "warm-blooded" bodies. The brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass some 5,500 species, distributed in about 1,200 genera, 152 families and up to 29 orders, though this varies depending on the classification scheme adopted.
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Some of this page is derived from Wikipedia. The original article was at mammal. The list of authors can be seen in the page history. As with WikiFur, the text of Wikipedia is available under CC-BY-SA and the GFDL. |