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Classification of Birds

Characterize the birds according to examples of representing beings, skin, basic morphology, respiration, circulation, nitrogen waste, types of reproduction and thermal control?

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a) Examples of representing beings: sparrows, chickens, ostriches, penguins.

b) Basic morphology: feathers, aerodynamic body, pneumatic bones, horny beaks.

c) Skin: feathers, impermeable keratinized, uropygial gland.

d) Respiration: pulmonary.

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

f) Nitrogen waste: uric acid.

g) Thermal control: homeothermic.

h) Types of reproduction: sexual, internal fecundation, shelled eggs with extra embryonic membranes.

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