Which of following is NOT a permanent mucosal fold in GIT?
The mucosa and submucosa of the stomach are folded into the grossly visible gastric rugae. When the stomach is empty, the mucosa and submucosa contract into thick folds forming rugae. As the stomach distends, the rugae flatten.
Spiral valve of Heister
Gastric rugae
Plica semilunaris
Transverse rectal fold