Development of the Digestive System- Embryo Flashcards
The formation of endoderm, mesoderm, ectoderm
gatrulation
Epiblast cells thickened band
primitive streak
Which germ layer forms th epithelial lining and glands of the GI tract?
endoderm
The endoderm that forms the innermost lining of the primitive gut tube is from where?
dorsal portion of yolk sac
The ____ duct temporarily connects the midgut and yolk sac
vitelline
What forms during the head fold (head folds under)?
foregut
What forms during the tail fold (under-ventrally) ?
hindgut
This membrane ruptures at week 4 and provides continuity between the oral cavity and the foregut
oropharyngeal membrane; allows for swallowing of amniotic fluid
This membrane ruptures at week 8 and allows for urination and defication
cloacal membrane
Which germ layer forms the smooth muscles and connective tissues of the GI tract (incl. mesenteries) ?
splanchnic mesoderm
Means related to organs (viscera)
splanchnic
The __________ is the serous membrane lining the abdominal cavity (parietal) & organs (visceral)
peritoneum
This type of peritoneum lines the abdominal cavity
parietal peritoneum
This type of peritoneum lines the organs
visceral peritoneum
________ is a double-layer peritoneum that suspends an organ from the body wall
mesentery
