Lecture Notes Dr. Grey Flashcards
Why are fish gills important to study?
Vertebrates look similar early in embryonic development
What is Ontogeny?
Early human development
What is phylogeny?
Early vertebrate evolution
What does the first branchial arch/fish gill turn into?
Mandible, eustachian tube, malleus, incus
What does the second branchial arch/fish gill turn into?
Stapes and inner ear
Where would a persistent second fish gill appear?
Base of the neck
What does the face develop from?
frontonasal prominence, pair of maxillary prominences, pair of mandibular prominences
When do clefts appear?
If prominences don’t fuse correctly
How do you repair clefts?
Trying to fill the gap with excess skin
What is atresia?
Failure of a normally occurring canal to form/open
What is the purpose of the nasolacriminal duct?
Drainage
What does choanal atresia connect?
nose and mouth
Does a choanal atresia need surgery? Why?
YES, cyclical respiratory distress
When does surgery occur for congenital aural atresia?
After 5 years of age
Why does surgery occur after 5 years for congenital aural atresia?
the pinna will not continue to grow
