embryology

Question 1

which germ layers is the GI tract derived from?

Answer 1

endoderm = epithelium, ducts and glands

visceral mesoderm = lamina propria, muscularis mucosa/externa

Question 2

what is the purpose of rotation of different parts of the t during development?

Answer 2

brings the mesenteries into their final position

Question 3

what do ventral mesenteries give rise to?

Answer 3

lesser omentum

falciform ligament

Question 4

what do dorsal mesenteries give rise to?

Answer 4

dorsal mesogastruim
dorsal mesoduodenum
dorsal mesocolon

Question 5

what are the checkpoints of oesophagus development?

Answer 5

week 4 = oesophagus becomes distinguishable
week 5 = circular muscle develops
week 8 = longitudinal muscle develops