A mammal (from Latin mamma ' breast ') [1] is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three middle ear bones.

3 天之前 · mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. In addition to these characteristic milk glands, mammals are distinguished by several other unique features.

4 天之前 · The meaning of MAMMALIA is the highest class of the subphylum Vertebrata comprising humans and all other animals that nourish their young with milk secreted by mammary glands, that have the skin usually more or less covered with hair, a mandible articulating directly with the squamosal, a chain of small ear bones, a brain with four optic lobes ...

2023年11月22日 · A mammal is a vertebrate animal that belongs to the class Mammalia. This group has several distinct features: Warm-blooded Metabolism: Mammals maintain a constant body temperature regardless of the environment.

哺乳动物（英語： mammals ）或哺乳类（ mammalians ）是脊椎动物亚门 四足总纲哺乳纲（学名： Mammalia ）下属所有动物的统称，是羊膜动物两大演化支之一——合弓纲唯一尚存的种群，分胎盘类（绝大多数）、有袋类和单孔类三支亚纲。

哺乳纲，属于脊椎动物亚门纲，通称兽类。哺乳动物是被毛、胎生、哺乳的高级脊椎动物，具有高度发达的神经系统和感觉器官，能协调复杂的机能活动。体被毛衣，体温高且恒定，减少对环境的依赖性。异型齿，口腔腺发达。出现口腔消化，提高了食物的利用率。胎生（除个别外），哺乳行 …

3 天之前 · Mammal - Classification, Class Mammalia, Monotremes, Marsupials & Placental Mammals: This classification of living mammalian taxa includes the subclass Prototheria (monotremes) and the subclass Theria (live-bearing mammals), which is comprised of infraclasses Metatheria (marsupials) and Eutheria (placental mammals).

Mammals are in the class Mammalia. They are a group of vertebrate animals. [3] They have fur or hair and very precise temperature regulation. With the exception of the monotremes, all mammals bear live young. Unlike other vertebrates, they are the only animals that produce milk for their young through their mammary glands. Parental care of the ...

哺乳动物 是指脊椎动物亚门下 哺乳纲 （拉丁语：Mammalia）的一类用 肺呼吸 空气的温血 脊椎动物 ，因能通过 乳腺 分泌乳汁来给幼体哺乳而得名。

Mammalia是一种动物。 本词条缺少概述图，补充相关内容使词条更完整，还能快速升级，赶紧来 编辑 吧！