Development Of The Face Flashcards
At the end of the _____ week, facial prominences appear.
Facial prominences that arise in the 4th week of pregnancy consist mainly of neural crest derived ________ and are formed by the first pair of ________ _______.
The facial prominences that appear during the 4th week of pregnancy are: (3 categories)
The ________ prominence is formed by the proliferation of mesenchyme ventral to the brain vesicles; constitutes the upper border of the _________ (future mouth)
The ________ prominences are located lateral to the stomodeum.
The _______ prominences are the lower border of the stomodeum.
The weeks 6 and 7, the ______ prominences increase in size.
The upper lip is formed by the two _____ ______ prominences and the two _______ prominences.
The _________ _________ prominences do NOT participate in the formation of the upper lip.
At first, the maxillary and lateral nasal prominences are separated by a deep furrow called the _______ ______.
Ectoderm in the floor of the nasolacrimal groove forms a solid cord that detaches from the overlying ectoderm. The cord canalizes (becomes hollow; forms a lumen) to form the ________ _______.
The upper end of (answer above) widens to form the _____ ____.
The nose is formed from ___ facial prominences.
The 5 facial prominences that form the nose are:
Merged medial nasal (2)
Lateral nasal (2)
As the maxillary prominences grow medially, the 2 medial nasal prominences merge not only at the surface, but at a deeper level.
The structure formed by the merging of the medial nasal prominences is composed of the ______, ______, and ______ components.
The labial component of the intermaxillary segment forms the ______ of the upper lip.
The ______ component forms a component that holds the 4 incisors.
The palatal component forms the triangular shaped ____ ______.
The main portion of the definitive palate is formed by the 2 shelf-like outgrowths from the maxillary prominences. The outgrowths are called the ____ ______ and appear during the 6th week of development. In the 7th week, they ascend to a horizontal position above the tongue and fuse.