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Mammalian teeth

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					Mammalian teeth




   The Need for food
       Animal Survival
         SG Biology
    Learning Outcomes (5)
• To know the different structure and
  functions of each type of tooth
• To understand the adaptations of a
  herbivore, omnivore and a carnivore
  to feeding.
       Feeding in mammals
• Mammals have teeth which may be used to
  bite pieces of food and to chew it into
  smaller pieces before swallowing.
• The shapes of teeth are suited to their
  function.
  – Incisors and canines are used for biting
  – Premolars and molars are used for chewing and
    crushing food.
Patterns of Teeth
Human Jaw
                   Teeth
• There are different types of teeth, each
  specially shaped to perform a particular
  job.
  – Incisor - A broad flat sharp tooth found at the
    front of the mouth. Designed for biting and
    cutting food.
  – Canine - A sharp pointed tooth for piercing
    flesh and tearing.
  – Pre-molar & molar - A broad flat tooth with
    many cusps. Its rough surface is used for
    crushing, grinding and chewing food
    Carnivore adaptations
• Look at the dog skull, and the
  diagrams of a dogs skull.
• With the aid of a diagram – make
  notes explaining how the dogs teeth
  and jaws are adapted for a
  carnivorous diet.
    Herbivore adaptations
• Look at the sheep’s skull, and the
  diagrams of a sheep skull.
• With the aid of a diagram – make
  notes explaining how the sheep's
  teeth and jaws are adapted for a
  herbivorous diet.

				
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posted:10/7/2011
language:English
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