Embryo 3

Question 1

Foregut

Answer 1

Mouth to descending duodenum. Endoderm, lungs, stomach, liver pancreas. Celiac trunk, greater splanchnic and vagus

Question 2

Rotation

Answer 2

Dorsal goes left. Clockwise rotation

Question 3

Midgut

Answer 3

Mid duodenum to 2/3 transverse colon. Primary intestinal loop. Superior mesenteric artery, lesser splanchnic, vagus.

Question 4

Hindgut

Answer 4

1/3 transverse colon to rectum. Terminates in anorectal canal. Inferior mesenteric artery, lumbar and pelvic splanchnic

Question 5

Annular pancreas

Answer 5

Malrotation chokes duodenum

Question 6

Malrotation midgut

Answer 6

Left sided colon or reversed intestines.

Question 7

Meckels diverticulum

Answer 7

Vitelline duct remains. Mimics appendicitis

Question 8

Hirschprungs disease

Answer 8

Parasympathetic lack in colon. Swells

Question 9

Urinary system

Answer 9

Forms from mesoderm. Kidneys, bladder. Kidneys ascend. Ducts enter bladder at trigone

Question 10

Gonads

Answer 10

Mesoderm. Wolffian ducts male, mullerian female.

Question 11

Sertoli cells

Answer 11

Inhibit Müllerian ducts

Question 12

Genital tubercle

Answer 12

Glans or clitoris

Question 13

Genital swelling

Answer 13

Labia majora, scrotum

Question 14

Urethral folds

Answer 14

Labia minora, urethra

Question 15

Androgen insensitivity

Answer 15

Genetic male lives as woman, no oviducts or uterus

Question 16

5a reductase deficiency

Answer 16

Little boys look like girls until puberty

Question 17

Hypomere

Answer 17

Muscles except back