Chapter 4 Flashcards
The human face develops during which weeks?
4-7th week
When do the palatal processes begin to close?
8th week
Lateral to the oral pit are right and left maxillary processes which develop ______
mandibular arch (cheek tissues come from this process)
What is present in the 5th week?
eyes and bilateral nasal pits
At 5 weeks the frontal area becomes known as the?
Fronto nasal process
True or False
Throughout the 5th week the mandibular arch loses the midline constriction
True
True or False
A lack of contact or fusion of the medial nasal and maxillary processes results in either a unilateral or bilateral cleft lip
True
The epithelial coverings of the medial nasal and maxillary processes normally contact and create a zone of fusion termed _____ _______
nasal fin
True
6 small hillocks of tissue termed the auricular hillocks are grouped around the external ear canal
True (3 of these come from the mandibular arch and 3 come from the second [hyoid] arch)
True or False
By the 7th week the face has a more human appearance
True
True or False
The palatal development occurs in weeks 7 through 9
True
What are the three parts of the tissues of the tongue?
Central tuberculum
impar
two lateral lingual swellings
The thyroid gland develops as an epithelial proliferation from ?
foramen secum (surface of tongue/junction of body and base)
True or False
Cells arise and migrate ventrally into the throat thus creating the thyroid gland
True
True or False
By the 7th week the thyroid descends to the front of the trachea
True
