Learning anatomy/Oral cavity

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Tooth[edit | edit source]

Anatomy[edit | edit source]

The teeth (singular: tooth) are made up of parts shown below.

  • Crown
    • Enamel
    • Dentin
  • Neck
    • Gingiva
    • Pulp cavity
    • Pulp
  • Root
    • Cementum
    • Root canal
    • Periodontal ligament
    • Nerves and blood vessels
    • Alveolar bone
  • Jaw
    • Maxillae
    • Mandible

Human tooth diagram-en

Function[edit | edit source]

The teeth function to chew food. The types of teeth are the incisors, canines, premolars, and molars. Incisors cut the food. The canines grip the food. The premolars and molars (from Latin: mola = grindstone) grind the food. A baby has 20 teeth, but they are not visible until they erupt through the gingiva (gums) and an adult has 32 teeth. The teeth help us speak.

Salivary gland[edit | edit source]

Anatomy[edit | edit source]

The parotid, sublingual, and submandibular glands are major salivary glands. The other ones are minor salivary glands. Blausen 0780 SalivaryGlands

Function[edit | edit source]

The salivary glands make saliva. Saliva travels through ducts and then into the mouth.

Saliva[edit | edit source]

Saliva has alpha-amylase which breaks down starch and lingual lipase which breaks lipids. Saliva also cleans the mouth.

Lingua[edit | edit source]

Anatomy[edit | edit source]

The lingua (tongue) is made up of the base (root), body, and apex.

Function[edit | edit source]

The lingua helps in speech. Saliva helps taste the food. The chemicals from the food travel from the lingual papillae to the taste buds. The lingua and saliva from the food bolus. It gets sent down the pharynx.

Air[edit | edit source]

The mouth is also a passage for air.