Perrault_Abdomen_Embryology Flashcards
mesocolon:
mesentary sheet that adhears the transverse colon to the posterior wall
developmental phases of development:
elongation/recanalization, herniation, rotation/folding, histogenesis, functional maturation
the primordial foregut incluides:
primordial pharynx, lower respiratory system, the esophogus, duodunum-proximal part, the liver, bilary apparatus, pancreas
the primordial foregut is vascularly supplied by the:
celiac artery
the primordial midgut includes:
small intestine, duodenum-distal part, cecum, appendix, ascending colon, 2/3 of the transverse colon
the primordial hindgut includes:
left 1/3 of transverse colon, descending colon, sigmoid colon, rectum, superior part of anal canal, epithelium of urinary bladder, most of the urethra
the primordial midgut is vascularized by the:
superior messentary
the primordial hindgut is vascularized by the:
inferior messentary
by the end of the first month, the endoderm will develop a series of _______ budding off of it
diverticulum
vitelline duct
In the human embryo, the vitelline duct, also known as the omphalomesenteric duct, is a long narrow tube that joins the yolk sac to the midgut lumen of the developing fetus.[1] It appears at the end of the fourth week, when the yolk sac presents the appearance of a small pear-shaped vesicle (the umbilical vesicle).
if the vitelline is left over, it is associated with the _____ and is called _____
illeum, merkle’s diverticuli
the endoderm that expands out from within the pharyngeal arches,
pharyngeal pouches
mesoderm that stayed with endothermal tube as it spread out laterally is called:
splancnic mesoderm
mesdoerm that stayed with the body wall while spreading is called:
somatic mesoderm
the two layers of cells that are surrounding the gut tube, that is pulled into the center of the cavity of the embryo is called:
splancnic mesoderm
the ____ and _______ structures will develop from the ventral wall
foregut, hindgut
the _____ does not develop from the ventral wall because of the ______
yolk sac
the yolk sac caused no mesentary in the abdominal cavity to be derived from the _______ and so most all of the mesentary of the abdomen is derived from the _____
dorsal wall
the thorax is separated from the diaphram by:
septum transversum (ventral wall)
the septum transversum grows out of the _____ and is called ______
ventral wall, somaticmesoderm
four sections that become the diaphram are:
septum transversum, pleuroperitoneal folds, mesentery of the esophagus, secondary ingrowth from the mesenchyme from the body wall
during the ______ phase, the GI forces its way into the thoracic cavity
elongation phase
esophogus starts as:
two layer tube
the esophogus elogates significantly while developing a muscular outer component from ______
splanchnic mesoderm
the esophogus is _____ and and expands to occlude the lumen
endodermal derived epithelium
_____ form and recanalize the lumen
vacuoles
during the secondary vacualization phase, the esophogus reopens and the _____ tissue becomes more _____,
cuboidal, columnar
growth factors are released from____ that signal the distal end of the esophogus to turn into the _____
the inside of the esophogus, circular muscle cells
the endodermal tube signals for the ____ to turn into muscle distally, and more connective tissue proximally
splancnic mesoderm
the lesser curvature of the stomach was _____ and the greater curvature was _____
anterior posterior
the stomach turns (right), there is differential growth, and the dorsal mesentary becomes the ____ and the ventral mesentary becomes the _____
greater omentum, lesser omentum
the ____ aspect of the tube grows faster than the______
posterior anterior
along with the increased growth of the ____portion of the stomach, there is an increased growth of the ____
posterior, dorsal mesentary
the anterior aspect of the peritoneal cavity is ___ layered and is derived from the ____
4, dorsal mesentary
heterotropic gastric
cells from differentiating stomach result in acid producing cells in random places (SI, Trans colon, esophogus)
at 1 month, the fetus will begin____ without it you have ____
drinking amniotic fluid, duodenal atresia
not drinking a amniotic fluid results in :
Polyhydramnios
Polyhydramnios is:
a medical condition describing an excess of amniotic fluid in the amniotic sac. It is seen in about 1% of pregnancies. It is typically diagnosed when the amniotic fluid index (AFI) is greater than 24 cm.
just ____ to the stomach you have 2 diverticular show up. they are anterior ____ and posterior______
distal, liver bud that develops into a biliary system, dorsal pancreas
the ___ is pulled posteriorly behind the ______
bile duct, duodenum
the transition from the foregut to the hindgut is denoted where: the pancreas is formed
the common bile duct is rotated behind the duodenum and projects through the pancreas
it is possible to find two tubes for the pancreatic duct because the accessory because
the head of the pancreas rotates around to fuse with the body
coronary ligaments of the liver, this is where:
ventral mesentary never came together because the liver grew so fast and grew too large to be attaached
the intestines start by making a _____, the ___ aspect of the loop rotates counterclockwise, it herniates out into the umbilical cord
hairpin loop, distal,
the intestines are all attached by a ______ attached to the _____
dorsal mesentary, posterior wall (creating pockets
the outer dorsal mesentary ends up fusing with the organs behind and creates ____
mesocolon
stem cells in the gut start in the _____ and then shed off after _______.
crypt, 4 days
the stem cells in the intestines sit on top of the ______
plica
omphalocele:
the instestines are not absorbed back into the stomach but are covered with mesentary
gastroschisis
not covered in peritoneal lining, develops out
hind gut supplies:
inferior mesentaric artery
the proctodeum is ____
end of the GI tract
the ______ is the common sewer system for all things needing to be pumped out of the urinary system:
cloaca
membrane in the ____eventually deteriorates and is covered posterior by ______
anus mesoderm
membrane in the ____eventually deteriorates and is covered posterior by ______
anus mesoderm
the center of your ischium region is the _____
peroneal membrane (serves as a wall from the future urinary system and future hindgut) 2
shift from hindgut to proctode denoted by
petinate to white line (stratified squamous signs
intraretroperitoneal organs
dj illeus, tranny cece signed stomachs with a pen
duodenum 1-4, jejunum ilium, transverse colon, cecum, sigmoid colon, stomach, appendix
secondary retroperitoneal
2nd grade, colon powell had a duo, colon (ascending and descending, duodenum 2, 3
retroperitoneal
REtroperitoneal, rectum, esophogus
