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23 de jun. de 2024 · Learn about the features and diversity of mammals, the group of vertebrates that nourish their young with milk and have hair, a muscular diaphragm, and a left aortic arch. Explore the evolution, distribution, and faunal realms of mammals with Britannica.
28 de dic. de 2020 · Learn how mammals are distinguished from other vertebrates by traits such as hair, mammary glands, single-boned lower jaws, and four-chambered hearts. Explore the diversity and adaptations of mammals with examples and images.
Learn about the diversity, adaptability, and evolution of mammals, the only animals with hair, mammary glands, and a hinged jaw. See photos and videos of mammals from every continent and ocean, and explore their diets, behaviors, and threats.
22 de nov. de 2023 · Learn what makes a mammal a mammal, with examples of different orders and species. Find out how mammals evolved, how they are classified, and some interesting facts about them.
A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /). Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
Mammals have four limbs and produce amniotic eggs. The mammal class is defined by the presence of mammary glands and hair (or fur). Other traits of mammals include sweat glands in their skin, alveoli in their lungs, a four-chambered heart, and a brain covering called the neocortex.
Learn what makes a mammal a mammal, from its warm-bloodedness and hair to its milk-secreting glands and four limbs. Explore the range and diversity of mammals, from bats and shrews to whales and apes.
