Bovine flap stomach is the rumen part of bovine stomach. Cattle is a ruminant. It has four gastric cavities: rumen, embryo, omnisum and aboma-sumsortruehuge. The stomach wall of rumen consists of submucosa, sarcolemma and serosa from the inside out, of which sarcolemma is the most developed.

It consists of two layers of smooth muscle, the inner teres muscle and the outer longitudinal muscle, which are the main edible parts of hairy belly. The flap stomach is actually a shutter. Because the layer inside the flap stomach is leaflike, it is called a hundred pages or a thousand layers of belly. In some parts of China, blind monks are also called hairy bellies.

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Nutrition of tripe: Tripe is rich in nutrients such as protein, fat, calcium, phosphorus, thiamine, riboflavin and nicotinic acid. Its taste is sweet, white, crisp and easy to digest. Has the effects of invigorating spleen and regulating stomach, invigorating qi and nourishing blood, tonifying deficiency and essence, quenching thirst and dizziness.

It is suitable for people with physical weakness, qi and blood deficiency, malnutrition and spleen and stomach weakness after illness. There was a record of eating beef tripe in Shang and Zhou Dynasties in China, and the "Spleen Analysis" in Five Horses in the Forbidden City was a sauce made of beef tripe.

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