Respiratory Embryology Flashcards

1
Q

where does the epithelium of the resp system develop from?

A

nasal cavity epi from ectoderm

rest is from endoderm

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2
Q

laryngotracheal groove

A

beginning of larynx, trachea, and lungs

evagination of endoderm along floor of pharynx

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3
Q

tracheoesophageal septum

A

grows from lateral walls of laryngotracheal groove and fuses along midline

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4
Q

larygotracheal tube

A

created by septum
separate from esophagus
future trachea and lung buds

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5
Q

larynx development

A

develops rostrally

lumen of groove retains communication with pharynx

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6
Q

laryngeal swellings

A

bilateral on laryngeal opening
give rise to cartilage of the larynx
from pharyngeal arch splanchnic mesoderm

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7
Q

laryngeal muscles

A

from somite myotomes that migrate into pharyngeal arches

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8
Q

developing trachea and lungs

A

LT tube grows caudally
bronchi shifted into splanchnic mesoderm which contributes cartilage and ct
endoderm gives resp epithelium

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9
Q

principal bronchi development

A

blind caudal end of LT tube develops bi lobed bronchial buds which outgrow to create lobar bronchi, segmental bronchi, bronchioles with alveoli

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10
Q

lung development

A

endoderm lined brachial tree
splanchnic mesoderm forms fascia and cartilage
branches initially solid but terminal branches become hollow with thin epi
septae partition terminal sacs to make alveoli

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