Ebryology 3 Flashcards
when does the embryo begin to fold
week 3
what tissue layer forms the gut tube
endoderm
when do the lungs start to develop
week 4 of gestation
where to the lungs start to develop from on the embryo
from the ventral wall of the foregut
where does the larynx develop from
pharangeal pouches at the laryngotracheal groove
where does the epiglottis develop from
from the bottom of the hypopharyngeal eminence
where does the lung bud develop from
the laryngotracheal diverticulum enlarges to form the lung bud
where does the larynx cartilage develop from
4th and 6th pairs of pharyngeal arches
where does the epiglottis develop from
the bottom of the hypopharyngeal eminence
what is laryngeal atresia
birth defect complete upper airway obstruction that occurs when the larynx fails to open during a baby’s development in utero and remains blocked by cartilage or other tissue after birth.
when does the trachea and bronchial buds begin to develope
4 weeks
when does the secondary bronchia buds and right and left main bronchus begin to develop
5 weeks
when do the lobes of each lung begin to develop
6 weeks
what does hypoplasia mean
incomplete or absence of an organ
the lung matures in 4 stages when does the pseudoglandular stage happen (weeks)
6-16 weeks
