Mammals have characteristics in their cells and bodies that help classify them as mammals. All mammals are vertebrates, are endothermic, have hair on their bodies and produce milk in order to feed their young.
Dogs are mammals. They are warm-blooded, which means they generate the heat of their own bodies. They have fur, and mother dogs feed their young with milk produced by their bodies.
Mammals, including humans, belong to the Mammalian class, which is the highest order of vertebrates. Mammals have a backbone, grow hair, produce milk for the nourishment of their young via mammary glands and are warm-blooded, or endothermic.
Mammals play a vital role for the ecosystem in which they live. Mammals are important for maintaining services and functions associated with sustaining a balanced ecosystem. Various mammals are used as a food and clothing resource. They are also important for different recreational purposes.
Humans are classified as mammals. Like other mammals, humans have body hair, suckle their young with milk produced from special glands on their chests, possess differentiated teeth and a four-chambered heart, and become pregnant rather than lay eggs.
As of 2015, there are about 5,000 known kinds or species of mammals. Mammals as a group are divided into three main kinds: placental mammals, marsupials, and monotremes,
A fish is not a mammal. Mammals are animals that are warm-blooded, breathe air, possess hair and give birth to live young that they feed milk from mammary glands. Fish are cold-blooded, extract oxygen from water, have scales and lay eggs.
Birds are not mammals. They don't have fur, and they don't nurse their young with milk as mammals do; however, birds share some traits with mammals. They are warm blooded and can eat a wide variety of food, from fruits and seeds to reptiles, fish, small mammals and other birds.
There are over 4000 species of mammals worldwide, but all share the same defining characteristics that separate them from other members of the phylum Chordata. These characteristics include having hair, being warm-blooded and producing milk for their young. All mammals except the platypus and echidn
Mammals have warm blood and hair on some or all of their bodies, and because a turtle lacks both of these things, it is not a mammal. A turtle is a reptile.