Face Development Flashcards
Lower face development:
Inferior to _____
Once fused at the _____, forms the ______
Seperates _______ from the developing _____
Stomodeum.
*2 mandibular processes migrate to the facial region.
Midline, mandibular arch
Stomodeum, heart
Lower face development: mandibular arch
Gives rise to ______
Lower face, mandible (includes teeth), structures associated with mandible (lips), tongue
Lower face development: lower face timeline
4th week-
5-6 weeks-
10th week-
Proliferation
Differentiation
Morphogenesis (fetal stage)
Upper face development: frontonasal process (middle face)
1. 2. 3. 4. 5.
1 forehead 2 bridge of nose 3 nasal septum 4 primary palate 5 structures associated with medial nasal processes
Upper face development: placodes (little circles)
*Lateral to frontonasal process
Lens placode-
Otic placode-
Nasal placode-
Lens- move medially to give rise to eyes
Otic- more posterior and lateral to give rise to internal ear
Nasal- anteriorly placed just superior to sternodeum, give rise to olfactory epithelium
Upper face development: sinuses
Developing tissue-
Nasal cavity-
Conchae develop-
Around nasal placodes submerge the placodes and give rise to nasal cavity.
Temporarily separated from stomodeum by oronasal membrane.
Simultaneously
Upper face development:
Medial to nasal placodes-
Lateral to nasal placodes-
Develop medial nasal processes. -give rise to primary palate and incisors and nasal septum.
Develop lateral nasal processes. -give rise to alae of nose -combined with maxillary and medial nasal processes give rise to nares
Mid face development: maxillary process
Arises from the _______
Mandibular arch (mesenchyme and neural crest cells)
Med face development: maxillary process
Will give rise to 1. 2. 3. 4. 5.
Lateral portion of upper lip Cheeks (zygoma) Secondary palate Canines and some posterior teeth Portions of temporal bone
Upper and lower lip development
Maxillary processes contribute to…
Lateral portion of upper lip and medial nasal processes to the philtrum.
Upper and lower lip development:
Lower lip forms…
Labial commissure formed…
Slightly ahead of upper lip by the mandibular arch.
By partial fusion of maxillary processes and mandibular arches