I found many answers during a search, they ranged from 14 hours to 1 week. The most official answer I could find was from a government website here:
http://www.ncbi.nlm.nih.gov/books/bv.fcgi?indexed=Google&rid=mboc4.section.4113
That said:
"In the small intestine, stem cells in the crypts generate new absorptive, goblet, enteroendocrine, and Paneth cells, replacing most of the epithelial lining of the intestine every week. The diverse fates of the stem-cell progeny are controlled, in part at least, by the Notch signaling pathway, while the Wnt pathway is required to maintain the stem-cell population."
Every 3 days
If your stomach didn't produce a new layer of mucus every week, it would digest itself.
produce new cells.
The Bascal Cell Layer, the deepest layer where cells divide to produce new skin cells.
Every 3 days.
The basal layer of the epidermis contains stem cells that continuously divide and differentiate to produce new epidermal cells. These stem cells are responsible for regenerating the skin's outer layer.
generation through mitosis of new cells to replace the stomach lining
Most all living spiecies it's how we digest our food, stomach acid in a human is some of the most powerful in the world we have to produce a new layer of mucus every two weeks in our stomah to keep from digesting our own selves
The basal layer is the epidermal layer that produces new cells through mitosis. This layer is located at the bottom of the epidermis and contains stem cells that continuously divide and give rise to new skin cells.
Female rattlesnakes produce a new litter every 3 years on average.
The deepest dividing epithelial layer of the skin is the stratum basale, also known as the basal layer. It is composed of a single row of columnar or cuboidal keratinocytes that undergo mitosis to produce new skin cells. This layer is crucial for the regeneration of the epidermis and contains melanocytes, which produce melanin, contributing to skin pigmentation. Additionally, it is anchored to the underlying dermis by the basement membrane.
The digestion of food in the stomach of an animal is a chemical process.In the stomach, there are various chemicals (such as digestive acids) and microorganisms (such as digestive enzymes). These react chemically with food to produce new chemical substances, which are then passed on to other parts of the body for further processing.