Oral Cavity & Oesophagus

Oral Cavity & Oesophagus

1. Opening of digestive tract

2. Teeth, tongue, salivary glands

3. Break food down - mastication

4. Lubricate food for swallowing

5. Salivary glands

   • Each gland has a duct to carry saliva to the mouth
   • 99% water, 1% mucous
   • Paratoid
   • Mandibular
   • Sublingual
   • Zygomatic

6. Tongue

   • Mechanical Digestion
   • Gustation (taste)
   • Aid swallowing
   • Thermoregulation
   • Grooming
   • Vocalisation

7. Pharynx

   • Muscular tube connecting back of nasal and oral cavities with oesophagus and larynx
   • Soft palate divides nasopharynx and oropharynx
   • Muscles contract forcing food to oesophagus
     • Epiglottis closes
       • Peristalsis occurs

8. Oesophagus

   • Smooth tube of stratified squamous epithelium
   • Mouth to stomach
   • Oesophageal hiatus in diaphragm
   • Peristalsis moves food