Mammals

Donald WinslowZoology

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