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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.
Animals (or Metazoa) are living creatures with many cells. Animals get their energy from other living things. Usually, they eat them or are parasites. Animals, plants, fungi, and some other living things have complex cells, so they are grouped together as eukaryotes . The study of animals is called zoology.
Over 1.5 million living animal species have been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft).
A mammal ( from Latin mamma 'breast') is a vertebrate animal of the class Mammalia ( / məˈmeɪli.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.
Dog. The dog ( Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it is derived from extinct gray wolves, and the gray wolf is the dog's closest living relative. The dog was the first species to be domesticated by humans.
A German Shepherd. Dogs are mammals, usually kept as pets or for work on farms or the police. Some dogs are trained to be rescue dogs, and join teams such as mountain rescue. They have been bred by humans from their ancestral wolves. They were the first animals to live with humans, as far as we know. [4]
Beginning. Books. Terrestrial animal. Arthropods (such as flies) are the most abundant terrestrial animals by species count. A terrestrial animal is an animal that lives on land such as dog, cat, an ant or an emu. It can also be used for some species of amphibians that only go back to the water to lay their eggs.
