LIPS

Question 1

description of the lip

Answer 1

it is mobile, fibromuscular folds

Question 2

function

Answer 2

valve of oral fissure

Question 3

extension

Answer 3

S and L= extends from nasolabial sulci and nares

I= mentolabial sulcus

Question 4

structure of the lip

Answer 4

external= skin
internal= mucous membrane

Question 5

muscles of the lip

Answer 5

1. orbicularis oris

2. sup and inf labial muscles

Question 6

•Transitional zone of the lips

Answer 6

continues into the oral

cavity where it is continuous with the mucous membrane

Question 7

•Labial frenula are considered

Answer 7

free-edged folds of
mucous membrane in the midline, extending from the
vestibular gingiva to the mucosa of the upper and lower
lips

Question 8

arterial supply of the lips

Answer 8

sup and inf labial branch of facial artery

Question 9

innervation of the lips

Answer 9

upper lip= sup labial branch of infra-orbital nerve(CN V2)

lower lip= inferior labial branch of mental nerve( branch of inferior alveolar nerve cnv3)

Question 10

lymph drainage of the lip

Answer 10

upper lip and lateral part of the lower lip is drained by submandibular lymph nodes

medial part of the lower lip is drained by submental lymph nodes