Histological cross section of the stomach in neonate guinea pig shows: 9,10. Tunica mucosa(M), tunica submucosa(Sm), tunica muscularis (Me), Serosa(S), gastric pit(Gp). X10, X40 H&E stain. 11,12. Lamina propria (Lp), collagen fibers)Cf), gastric pit(Gp), blood vessel(Bv). X10, X40 Masson’s trichrome stain. 13,16. The cardiac region: cardiac glands(Cg), mucous cell (Mc), and parietal cells (Pc). X10, X40 Alcian blue and PAS stain. 14,17. The fundic region: chief cells(Cc), parietal cells(Pc), mucous neck cells(Mc). X40 Alcian blue and PAS stain. 15,18. The pyloric region: gastric pit(Gp), pyloric glands(Pg). X40 Alcian blue and PAS stain.