Oral cavity
- Created by: saoirselb
- Created on: 06-11-19 11:49
View mindmap
- Oral cavity
- Functions
- Digestion
- Receives food, prepares it for digestion in stomach and small intestine
- Communication
- Modifies sound produced in larynx to create a range of sounds
- Breathing
- Acts as an air inlet to the nasal cavity
- Digestion
- Divisions
- Vestibule
- Space between lips/cheeks and gums/teeth
- Opposite the second molar tooth, the parotid gland opens into the vestibule, secreting salivary juices
- Mouth cavity proper
- Bordered by roof and floor of mouth as well as cheeks
- Tongue fills a large proportion of the cavity
- Vestibule
- Roof of mouth
- Hard palate
- Found anteriorly
- Bony plate that separates nasal cavity from oral cavity
- Covered superiorly by respiratory mucosa and inferiorly by oral mucosa
- Soft palate
- Posterior continuation of hard palate
- Muscular structure
- Acts as valve that can lower to close the oropharyngeal ithmus and elevate to separate the nasopharynx from oropharynx
- Hard palate
- Floor of oral cavity consists of:
- Muscular diaphragm
- Comprised of bilateral mylohyoid muscles
- Provides structural support to floor of mouth
- Pulls larynx forward when swallowing
- Geniohyoid muscles
- Pull larynx forwards during swallowing
- Tongue
- Connected to floor by the frenulum of the tongue (a fold of oral mucosa)
- Salivary glands and ducts
- Muscular diaphragm
- Cheeks
- Formed by buccinator muscle
- Contracts to keep food between the teeth when chewing
- Innervated by buccal branches of the facial nerve (CN VII)
- Lined internally by oral mucous membrane
- Formed by buccinator muscle
- Innervation
- Sensory innervation supplied by branches of trigeminal nerve (CN V)
- Hard palate
- Innervated by greater palatine and nasopalatine nerves - branches of maxillary nerve (CN V2)
- Soft palate
- innervated bt lesser palatine nerve (another branch of maxillary)
- Floor of cavity innervated by lingual nerve (branch of mandivular (V3) division of trigeminal nerve
- Tongue
- innervated by special sensory fibres for taste from chorda tympani, branch of facial nerve (CN VII)
- Gag reflex
- Protective against foreign bodies touching posterior aspects of oral cavity
- Untitled
- Functions
Comments
No comments have yet been made