This document discusses dentition in mammals. It defines dentition as the type, nature, and arrangement of teeth in an animal's oral cavity. Teeth serve functions of attack, defense, and manipulating food. There are two types of teeth - epidermal teeth derived from epidermis found in fish, amphibians, reptiles, and some aquatic mammals, and dermal teeth, or true teeth, derived from dermis found in most mammals.

1. DENTITION IN
MAMMALS
Aleena Elizabeth Cyril

2. DENTITION
• Type , nature and arrangement of teeth
present in the oral cavity of an animal.
Aleena Elizabeth Cyril

3. Functions of teeth
• In some animals,
teeth help in
attack or defence
•In others, for
manipulating food
Aleena Elizabeth Cyril

4. Types of teeth
Epidermal teeth
• Derived from epidermis
• Cornified epithelial conical
projection
• In fishes, amphibians
reptiles & some aquatic
mammals like Platypus,
Whales, Echidna...
Dermal teeth
• True teeth
• Derived from dermis
• Most mammals
Aleena Elizabeth Cyril

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