Embryology Unit II

Question 1

Structures formed from the foregut

Answer 1

Esophagus, Stomach, Proximal 1/2 of duodenum

Question 2

Blood supply to the foregut

Answer 2

Celiac artery

Question 3

Structures formed from the midgut

Answer 3

Distal 1/2 of duodenum, Jejunum, Ileum, Ascending colon, Proximal 2/3 of transverse colon

Question 4

Blood supply to the midgut

Answer 4

Superior mesenteric artery

Question 5

Structures formed from the hindgut

Answer 5

1/3 transverse colon, Descending colon, Sigmoid colon, Rectum, Upper anal canal

Question 6

Blood supply of the hindgut

Answer 6

Inferior mesenteric artery

Question 7

Clockwise rotation of the stomach: greater curvature =>

Answer 7

Left, caudal

Question 8

Clockwise rotation of the stomach: Lesser curvature =>

Answer 8

Right, cranial

Question 9

Clockwise rotation of the stomach: L. vagus nerve =>

Answer 9

anterior

Question 10

Clockwise rotation of the stomach: R. vagus nerve =>

Answer 10

posterior

Question 11

Clockwise rotation of the stomach: duodenum

Answer 11

Right, Pulled into C-shape, retroperitoneal, against dorsal wall

Question 12

Clockwise rotation of the stomach: dorsal mesogastrum expands =>

Answer 12

greater omentum

Question 13

Clockwise rotation of the stomach: Lesser sac created by Dorsal Mesogastrum Expansion =>

Answer 13

pouch dorsal to stomach

Question 14

Structures formed from Paramesonephric (Mullerian) ducts

Answer 14

Fallopian tube, Uterus, Upper Vagina

Question 15

Structures formed from Mesonephric (Wollfian) ducts

Answer 15

Efferent ductules, Epididymis, Ductus Deferens, Seminal Vesicles, Ureteric bud, Trigone of bladder

Question 16

Structures formed from metanephric cap (blastema)

Answer 16

filtration system of kidney

Question 17

Structure formed by ductus arteriosus

Answer 17

ligamentum arteriosum

Question 18

Structure formed by ductus venosus

Answer 18

ligamentum venosum

Question 19

Structures formed by hepatic diverticulum

Answer 19

Liver Cords, Bile Canal, iculi, Hepatic Ducts

Question 20

Structures formed by cystic diverticulum

Answer 20

Gall bladder, Cystic Duct

Question 21

Structure formed by V/D pancreatic buds

Answer 21

pancreas

Question 22

Structures formed by female gubernaculum

Answer 22

Round Ligament, Ovarian Ligament

Question 23

Structure formed by processus vaginalis

Answer 23

Outpouching of Peritoneal Sac, Inguinal canal (in Males)

Question 24

Structure formed by umbilical vein

Answer 24

ligamentum teres

Question 25

Structures formed by umbilical arteries

Answer 25

Medial Umbilical Ligaments

Question 26

Structures formed by foramen ovale

Answer 26

fossa ovalis

Question 27

Structures formed by metanephros

Answer 27

Definitive Adult Kidney

Question 28

Structures formed by dorsal wall of stomach

Answer 28

greater curvature

Question 29

Structures formed by ventral wall of stomach

Answer 29

lesser curvature

Question 30

Structures formed by dorsal mesogastrum

Answer 30

Expands into greater omentum, Gastrophrenic Ligament, Gastrosplenic Ligament, Splenorenal ligament

Question 31

Structures formed by primary intestinal loop

Answer 31

Jejunum & Ileum (Cranial Limb), Ileum, Ascending & Transverse Colon (Caudal Limb)

Question 32

Structures formed by urogenital sinus

Answer 32

Bladder, Lower Vagina/Vestibule, Pelvic Urethra, Prostatic Part of Urethra/Penile Urethra

Question 33

Structures formed by intraembryonic coelomic cavity

Answer 33

Peritoneal Cavity, Innermost mesodermal lining => Peritoneum

Question 34

Structures formed by ventral mesogastrum

Answer 34

Falciform Ligament, Coronary, R & L Triangular ligaments, Lesser Omentum

Question 35

Structures formed by septum transversum

Answer 35

Where Liver FormsDiaphragm (and from pleuroperitoneal folds)

Question 36

Structures formed by the genital tubercles

Answer 36

glans of penis/clitoris

Question 37

Structures formed by genital (urethral) folds

Answer 37

Labia Minora, Penis

Question 38

Structures formed by genital (labioscrotal) swellings

Answer 38

Labia Majora, Scrotum