Tissue Used to Prepare Natural Sausage Casings

Natural casings are prepared from:

Correct Answer: Submucosa

Natural casings used in sausage making are prepared from the submucosa (submucosal layer) of the intestine after thorough cleaning and processing.

Layers of the Intestinal Wall (Inside → Outside)

1. Mucosa — innermost layer; scraped off during casing preparation
2. Submucosa — the functional layer used for natural casings; rich in collagen fibres → strong, flexible, permeable to smoke
3. Muscularis — smooth muscle layer; removed
4. Serosa — outermost layer; removed

Advantages of Natural Casings

• Permeable to smoke and moisture → good smoke penetration
• Collagen-based → tender, edible
• Natural 'bite' and texture preferred by consumers

Casings from Different Animal Parts

• Small intestine → Rounds (sheep/goat), Runners (cattle)
• Large intestine → Middles (cattle), Chitterlings (pig)
• Caecum → Bung (cattle/pig)
• Stomach → Maws (pig)
• Oesophagus → Weasand (cattle)

Catgut

• Absorbable suture material obtained from submucosa of small intestine of sheep (NOT cat!).