文档介绍：Mammal
By Sixth Group
01 What is mammal?
02 Characteristic of Mammals
03 Several Common Mammals
CONTEN
Mammal
By Sixth Group
01 What is mammal?
02 Characteristic of Mammals
03 Several Common Mammals
CONTENTS
What is mammal?
A class of vertebrates;
Mammals include more than 4000 species.
01 What is mammal?
02 Characteristic of Mammals
03 Several Common Mammals
CONTENTS
Characteristic of Mammals
hair/fur
mammary glands which produce milk
Characteristic of Mammals
Endothermic
well-developed brains
Mammals all over the world
01 What is mammal?
02 Characteristic of Mammals
03 Several Common Mammals
CONTENTS
Insectivora
Small pointed teeth, adapted mainly for eating insects
Ex. Moles, shrews, hedgehogs
Rodentia
nearly 50% of mammals are rodents.
Have no canine teeth, but two very larger incisors.
Almost all are herbivores.
Ex. Mice, squirrels, beavers.
Edentata
Have no teeth
Ex. Armadillos, sloths, anteaters
Carnivora
very diverse group
meat eaters
canine teeth highly developed,
Ex. Wolves, bears, raccoons, otters, skunks, mongoose, cats
Lagomorpha
large incisor teeth
hindlimbs larger than forelimbs
Ex. Rabbits and pikas
Cetacea
highly developed brain
have a dorsal blow-hole
Ex. Toothed whales，baleen whales
That’s all, Thanks for listening!