Pancreas and spleen

Question 1

Pancreas

Answer 1

Derived from foregut

Ventral bud: head and main duct, uncinate process alone
Dorsal bud: everything else

Question 2

Annular pancreas

Answer 2

Ventral bud abnormally encircles 2nd part of duodenum, leads to duodenal narrowing

Question 3

Pancreas divisum

Answer 3

Ventral and dorsal part fail to fuse at 8th week

Question 4

Spleen

Answer 4

Arise in mesentery of stomach (hence is mesodermal)

but is supplied by foregut (celiac artery)