膽道系統由胚胎期的何者而來？

A. Foregut

B. Midgut

C. Hindgut

D. Duodenal bud

E. Cephalic bud

 

Ans: A

 

構造

器官

Foregut
(Celiac trunk)

Esophagus, lower respiratory tract, stomach, duodenum (up to ampulla of vater), liver, gallbladder, pancreas, spleen (脾臟來自mesodermal dorsal mesentery，而前腸源自endoderm，然脾臟的血流供應是由前腸而來)

Midgut
(Superior mesenteric a.)

Duodenum (2nd to 4th portion), jejunum, ileum, cecum, appendix, ascending colon, hepatic flexure of colon, transverse colon (proximal 2/3)

Hindgut
(Inferior mesenteric a.)

Transverse colon (distal 1/3), splenic flexure of colon, descending colon, sigmoid colon, rectum, anal canal

Duodenal bud

(資料少)主要形成十二指腸，可能還有dorsal pancreatic bud

Cephalic bud

Right and left lobe of liver

Caudal bud

Biliary tract and gallbladder

embryo.PNG


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