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A Sumerian group of two separate shell inlay fragments forming the body and head of a sheep, c. 27th–24th Century BC. Human uses of mammals include both practical uses, such as for food, sport, and transport, and symbolic uses, such as in art and mythology. Mammals have played a crucial role in creating and sustaining human culture.
A mammal (from Latin mamma 'breast') [1] 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 broad neocortex region of the brain, fur or hair, and three middle ear bones.
e. The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. By the mid- Triassic, there were many synapsid species that looked like mammals. The lineage leading to today's mammals split up in the Jurassic; synapsids from this ...
Fur. Like many mammals, grizzly bears are covered in thick fur. Fur is a thick growth of hair that covers the skin of almost all mammals. It consists of a combination of oily guard hair on top and thick underfur beneath. The guard hair keeps moisture from reaching the skin; the underfur acts as an insulating blanket that keeps the animal warm.
Siberian tiger. In zoology, mammalogy is the study of mammals – a class of vertebrates with characteristics such as homeothermic metabolism, fur, four-chambered hearts, and complex nervous systems. [1] Mammalogy has also been known as " mastology ", " theriology ", and " therology ". The archive of number of mammals on earth is constantly ...
Respiratory system. The respiratory system (also respiratory apparatus, ventilatory system) is a biological system which consists of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives ...
t. e. Mammalia is a class of animal within the phylum Chordata. Mammal classification has been through several iterations since Carl Linnaeus initially defined the class. No classification system is universally accepted; McKenna & Bell (1997) and Wilson & Reader (2005) provide useful recent compendiums. [1] Many earlier ideas from Linnaeus et ...
Human uses of animals. Human uses of animals include both practical uses, such as the production of food and clothing, and symbolic uses, such as in art, literature, mythology, and religion. All of these are elements of culture, broadly understood. Animals used in these ways include fish, crustaceans, insects, molluscs, mammals and birds.