Block 2 Flashcards
Pharangeal arches develop in the ___ week
4th
Neural Crest cells form from the developing ______
Neural Plate
In the creation of the arches Neural Crest Cells migrate from posterior/dorsal neural tube region to the _____.
anterior/ventral
Rapid proliferating _____ begin to form prominences.
mesenchyme
The stomatodeum forms in the embryo, laying _____ throughout the oral cavity
Ectoderm
Stomodaeum and primitive pharynx are separated by the ______ membrane.
buccopharyngeal
Buccopharyngeal membrane ruptures opening the ____.
oropharynx
Which germ layer are clefts derived from?
External ectoderm
Which germ layer are pouches derived from?
Endoderm
Cleft 1
External Auditory Meatus
Clefts 2-4
Cervical Sinus that normally resorb
True or False
Cervical cysts form in the medial area of the neck
False
They form laterally
Pouch 1
Pharyngotympanic Tube
Pouch 2
Palatine Tonsil
Pouch 3
Inferior Parathyroid Gland & Thymus
Pouch 4
Superior Parathyroid Gland & Ultimo branchial body
What does the Ulimo Branchial body do?
Joins the thyroid and forms Follicular C Cells that produce Calcitonin
Fill in the blanks regarding the formation and migration of the thyroid:
It forms at the midline of the pharynx just below the ____.
Thyroid migrates from the _______ to below the Cricoid.
Migration forms the _______ Duct.
Tuberculum impar
foramen cecum
Thyroglossal
What type of cysts can result from thyroid migration?
Where are they located on the neck?
Thyrogloassal duct cysts
Midline
