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Characteristics of Mammals (teeth (Screenshot (165), Screenshot (166),…
Characteristics of Mammals
Two characteristics that distinguish members of class Mammalia from other vertebrate animals are
hair and mammary glands
Mona Alzamil Sarah AlRajhi
Excretion
Kidneys excrete or retain the proper amount of water in bodily fluids.
Enables mammals to live in extreme environments
Temperature
Endothermy
They regulate their body temperature by metabolic means
Feeding
Insectivores: eat insects and small invertebrates
Herbivores: feed on vegetation
Carnivores: mostly feed on herbivores
Omnivores: feed in both pants and animals
Digestion
Mammals cannot digest cellulose, a component of plant cell walls.
Some herbivores have bacteria in their gut that break down cellulose.
Teeth reveal the life habits of a mammal.
Carnivores use canines to stab and premolars to slice and shear meat.
Incisors of insectivores are long and curved, functioning as pincers in seizing insect prey.
teeth
Premolars:
Molars:
Canine:
Incisors : write the definition+ add pictures and function
Hair
Hair is made of a fibrous protein called keratin.
Mammary glands
Mammary glands produce and secrete milk that nourishes developing young.
