Lymphatic system-Lymphatic drainage of oral cavity
a) hard palate.
b) hard palate and upper lip.
c) hard palate, upper lip and upper central incisor.
d) hard palate, upper lip, upper central incisor and lower first molar.
a) left submental lymph node.
b) left and right submental lymph nodes.
c) left submandibular lymph node.
d) left and right submandibular lymph nodes.
The skin of the head and neck drains
The scalp drains into the occipital, mastoidand parotid nodes.
Lower eye lid and anterior cheekdrains into buccal LNs.
The cheeks drain into the parotid, buccaland submandibular nodes.
The upper lips and sides of the lower lips drain into the submandibular nodes.
The middle third of the lower lip drains into the submental nodes
The skin of the neck drains into the cervical nodes.
The drainage of the oral structures
The gingivae drain into the submandibular, submental and upper deep cervical lymph nodes.
The palate lymph vessels may pass to submandibular or superior deep cervical nodes (level II). Retropharyngeal nodes are very rarely involved.
Teeth drain into the submandibular and deep cervical lymph nodes.
Anterior part of mouth floor drain into submental and upper deep cervical.
Posterior part of mouth floor into submandibular and upper deep cervical.