Mucus to be less specific
smooth muscle
Yes, your stomach is lined with mucus. The chemicals the stomach secretes (i.e., pepsin) are designed to digest protein. But your stomach walls are also made of protein! The mucus coats the lining of your stomach so the chemicals do not destroy the lining.
stomach
stomach
Smooth muscles
The inside of a frog's stomach has hard ridges. These hard ridges help mix the food with the digestive fluids when the stomach muscles churn the contents. The shape of these hard ridges is actually the shape of frog's stomach.
Smooth muscles
chemical barrier
The Stomach
Your stomach and your esophagus are both lined with mucous (snot, boogers, phlegm, etc.) which is a slippery liquid-like base that allows things to be swallowed easier and it's tough nature allows it to line your stomach and protect the lining from the stomach acid inside you.
it lined with mucus to help digest the food chemically and to keep the stomach from acid
Pore cell