The composition of the casing

The intestine can be divided into four layers: mucosa, submucosa, muscularis and serosa from the inside out. When processing the salt casings of pigs and sheep, only the submucosa is left, and the other three layers are scraped off; when processing the dry casings of pigs and sheep, part of the mucosa is retained in addition to the submucosa; when processing the salt and dry casings of cattle, only the mucosa is removed. And keep the other 3 layers.