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Classification of mammals

Characterize the mammals in accordance with the examples of representing beings, skin, basic morphology, respiration, circulation, nitrogen waste, thermal control and types of reproduction?

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a) Examples of representing beings: dogs, cats, horses, giraffes, elephants, apes, humans, bats, whales, dolphins, opossums, kangaroos, platypus.

b) Basic morphology: hair, diaphragm muscle, mammary glands, enucleated red blood cells.

c) Skin: impermeable, hairy.

d) Respiration: pulmonary.

e) Circulation: closed and complete, heart with four chambers.

f) Nitrogen waste: urea.

g) Thermal control: homeothermic.

h) Types of reproduction: sexual, internal fecundation, oviparous monotremes (prototherians), marsupials (metatherians), placental (eutherians).

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