Development of Face and Oral Cavity Flashcards
Forebrain grows rostrally (toward Oral Cavity) to overhang _____ and ______
Buccopharyngeal Membrane
Primitive Heart
______ induce formation of neural plate within ectoderm
Mesoderm cells
Neural Crest Cells develop from
Lateral margins of Neural Plate
Neural Crest Cells are source of
Ectomesenchyme for Head and Neck (Dentin, Meninges, Pharyngeal Arches)
In CT of head NCC develop into
Fibroblasts and Pericytes
At end of NCC migration, they attach to neural tube and form sensory ganglia of _________
CN 5 (Trigeminal), 7 (Facial), 9 (Glossopharyngeal) 10 (Vagus)
Pharyngeal lining is
Endoderm
Epithelium of Stomadeum and Rathke’s pouch (adenohypophysis) is
Ectoderm
Organs behind Buccopharyngeal membrane are _____ while organs anterior are ______
Endoderm
Ectoderm
During 4th week, mesenchymal growth begins for _______
Mandibular, Maxilla, and Nasal Processes
1st indication of nasal swelling is the ______ which sinks into mesenchyme forming the ______
Nasal Placode
Nasal Pit
During the 5th week lateral and medial nasal swellings ______
Grow to form a Nasal Pit
Medial swellings of the nose form:
Middle of Nose
Philtrum
Intermaxillary bone
Entire primary palate
Formation of the face arises from
Mandibular and Maxillary Processes
Lateral and Medial Nasal swellings
The ______ is formed between lateral nasal swellings and maxillary process
Nasolacrimal Duct
Primary Palate formation occurs during ______ and is a result of _______
5-6th week
Fusion of medial nasal and frontonasal processes
Three outgrowths appear in oral cavity:
Nasal Septum (downward from frontonasal process) 2 Palatal Shelves
After tongue is withdrawn, the palatal shelves _______
Elevate and fuse with each other and the primary palate (will separate the oral from nasal cavity)
The Nasal Cavity is formed from fusion of ______ with ______
Palatal shelves
Nasal Septum
Cleft Lip is a result of lack of fusion between _____ and ____
Maxillary Prominence
Median Nasal Prominence
Anterior Palate Cleft is result of lack of fusion between ______ and ______
Lateral Palatal Shelf
Primary Palate
Secondary Palate Cleft is result of lack of fusion between
Lateral Palatal Shelf
Nasal Septum
Tongue development occurs which Pharyngeal Arches
1st, 2nd, and 3rd
During tongue development, the 1st pharyngeal arch forms
Anterior 2/3 Tongue from Ectoderm
Two lateral lingual prominences & Central prominence
During tongue development, the 2nd and 3rd pharyngeal arch forms
Posterior 1/3 Tongue from Endoderm (3rd overgrows 2nd)
Middle Hypobranchial Eminence
The Thyroid develops in gut as invagination between _____ and _______ at _______
Tuberculum Impar and Cupola
Foramen Caecum
During week 7 the thyroid lies at level of ______ after passing ventral to hyoid
Laryngeal Primordia
