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Mammals Donald Winslow Zoology 12 April 2010
Characteristics of mammals Synapsid skull, hair, keratin, follicles Glands: sweat, scent, sebaceous, and mammary Teeth diphyodont & usually heterodont Vibrissae, secondary palate, eyelids & external ears 4 limbs, many types of locomotion 4-chambered heart; nonucleated red blood cells Muscular diaphragm, often horns or antlers
Mammalian teeth Incisors Canines Premolars Molars
Mammalian red blood corpuscles Non-nucleated Biconcave Erythrocytes
Mammalian horns True horns Antlers Rhino horns
Mammalian feeding strategies Insectivores Herbivores Browsers, grazers, gnawers, cellulose, ruminants Carnivores Piscovores Omnivores
Migration Caribou Arctic National Wildlife Refuge
The Origin and Early Evolution of the Mammals
MAMMALS I.Characteristics A.Body covered with hair 1.As with the feathers of birds, and the “shed” of reptiles, mammal’s fur is made from the protein keratin.
MAMMAL SKULLS. GENERAL CLASSIFICATION CARNIVORE Obtains energy from flesh of other animals.
Mammal characteristics Soft anatomy Skin glands (sweat, scent, sebaceous) Lactation Hair Diaphragm 4-chambered heart High metabolic rate Hard anatomy (i.e.,
Introduction to Mammals Endotherms Hair or Fur Feed Young with Milk.
Characteristics of Mammals By Noelle Thrash. Mammals have hair mammals are the only animals that have hair or fur. Mammalian fur is made out of keratin.
Mammals!!! NB #159 Write this on your own paper.
The (nine) Characteristics of MAMMALS
Mammals. What Makes a Mammal? 5 Things All Mammals Have in Common: –All breathe air –All have 4-chambered heart –All are endotherms (warm-blooded) –All.
Section Hair – all mammals have hair, even whales (a few whiskers on snout) Filament composed of dead cells filled with keratin Functions:
Mammals 4,450 species. Characteristics Body covered with hair 4 limbs 7 cervical vertebrae 4 chambered heart.
Copyright Pearson Prentice Hall
KINGDOM ANIMALIA Phylum Chordata Subphylum Vertebrata Class Mammalia
Chapter 30 MAMMALS. Existed for 200 million years Therapsids - features of both reptiles & mammals.
Hannah Reagan 3 rd period. Class Mammalia Have hair and mammary glands (produce milk to nourish the young) Also, mammals breathe air, have four-
Endothermic Warm- Permits high level of activity at (regardless of outside temperature) Females have Function: About Ex: cats, dogs, humans,
Mammals Mammal Numbers Appeared 140 million yrs ago. Appeared 140 million yrs ago. Dinosaur food for 80 million yrs. Dinosaur food for 80 million yrs.
Birds and Mammals. Determine which characteristic is common to birds or mammals or both. Mouth usually has teeth Mammal.
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