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Embryoq2

mash

QuestionAnswer
name the adult derivatives of the following: a. dorsal third pouch b. ventral 4th pouch a. inferior parathyroid glands b. ultimobranchial body
discuss formation of the cervical sinus 2nd pharyngeal arch folds caudally, overlapping the 3rd and 4th. It then fuses with the epicardial ridge after covering the 2nd, 3rd, and 4th pharyngeal clefts
name the primordium responsible for each part of the tongue listed below a. anterior 2/3 b. posterior 1/3 a. lateral lingual swellings b. copula
name 2 derivatives of the caudal limb of the primary intestinal loop distal 2-3 of ileum, ascending colon, cecum, right 2/3 of transverse colon
name 2 derivatives of the cephalic limb of the primary intestinal loop distal duodenum, jejunum, most of ileum
exactly where does the midgut end in the adult junction of the right 2/3 and the left 1/3 of the transverse colon
list the degrees and rotation of the gut during its return to the abdominal cavity only 180 deg. counter clockwise
discuss the development of the falciform ligament and the lesser omentum the liver grows and protrudes into the septum transversarum. The mesoderm between ventral abdominal wall and liver becomes falciform ligment. The mesoderm between liver and stomach becomes lesser omentum.
From what embryonic components do the following parts of the liver develop? a. parenchyma b. connective tissue a. gut endoderm b. mesoderm of septum transversarum
Artery whose branches supply the derivatives of the midgut Superior mesentaric
List the embryonic components that collectively form the definitive arch of the aorta left 4th aortic arch, aortic sac of truncus arteriosus, left dorsal aortae
Explain why the right recurrent laryngeal n. loops under the right subclavian a. but the left loops under the arch of the aorta. The right 6th aortic arch regresses, allowing right recurrent laryngeal to move underneath the 4th aortic arch.
Specifically, where does the hindgut end in an adult the pectinate line of the anal canal
Branchial arch composition of the anterior 2/3 of the tongue ventral mandibular arch mesoderm
What week and why does the midgut undergo physiological umbilical herniation week 6, because the abdominal cavity is too small for the fast growing midgut
Draw two diagrams showing positional changes of the cephalic limb of the primary intestinal loop during return of the midgut
Anomaly formed when part of the vitelline duct persists at the apex of the primary intestinal loop Meckel's Diverticulum
In detail, how does a left-sided cecum develop the midgut only rotates 90 degrees during physiological herniation, doesn't rotate 180 degrees during return.
What develops from the a. left 4th aortic arch b. left 2nd aortic arch a. aortic arch between left subclavian and left common carotid b. regresses
adult derivatives of the a. dorsal 4th pouch b. 3rd cleft a. superior parathyroids b. nothing
artery whose branches supply the derivatives of the caudal foregut celiac trunk
Briefly, what happens to the endodermal epithelium of the esophagus and intestine in the second month of development luminal obliteration followed by recavitation
Briefly describe an omphalocele. How does it occur? A herniation of the midgut out to the umbilical cord covered by amnion. The midgut herniates, returns, and then herniates again.
Specifically how does a structure become secondarily retroperitoneal? The dorsal mesentary fuses with parietal peritoneum of the posterior abdominal wall.
Give the embryonic derivation of the ICA distal 2/3 from anterior extension of dorsal aortae, proximal 1/3 from 3rd aortic arch
Discuss the development of an internal branchial fistula. Abnormal breakdown of tissue between the 2nd branchial pouch and cleft
Adult derivatives of a. 2nd cleft b. 2nd pouch c. ventral 3rd pouch d. copula a. nothing b. palatine tonsil and fossa c. thymus d. posterior 1/3 of tongue
discuss the rotational movements of the stomach rotates 90 deg. clockwise around the vertical axis, clockwise on AP axis
Adult derivatives of a. 2nd aortic arch b. distal left 6th arch a. regresses b. ductus arteriosus
Earliest branchial arch composition of posterior 1/3 of the tongue mesoderm from arches 2,3,4
The brachiocephalic artery specifically develops from what embryonic component? aortic sac of truncus arteriosus
Derivatives of a. right 4th aortic arch b. left 1st aortic arch a. proximal part of right subclavian a. b. regresses
give the derivatives of: a. distal part of right 6th aortic arch b. left 4th aortic arch c. 3rd aortic arch a. ductus arteriosus b. arch of aorta between left subclavian and left common carotid c. common carotid and proximal 1/3 of ICA
Embryonic component that forms: a. left subclavian artery b. portion of the right subclavian immediately proximal to the vertebral a. a. left 7th intersegmental a. b. right dorsal aorta
Adult derivatives of the following: a. 2nd cleft b. 2nd pouch c. ventral 3rd pouch d. copula a. regresses b. palatine tonsil and fossa c. thymus d. posterior 1/3 of tongue
Created by: cooandrew