Spinal cord is a part of the central nervous system within the vertebral canal.

Beef Aort is the main heart vessle. Aort use as a human food in China and some other countries.

The omasum is the third compartment of the stomach in ruminants. Though its functions have not been well-studied, it appears to primarily aid in the absorption of water, magnesium, and the volatile fatty acids produced by rumen fermentation, that have not been absorbed into the bloodstream yet. The numerous folds of its mucosa are thought to trap digesta particles so the maximum amount of nutrients may be absorbed.

Omasum not discharge any substance, but a lot of water and some organic acids are absorbed by Omasum.

Beef tripe is usually made from only the first three chambers of a cow’s stomach: the rumen (blanket/flat/smooth tripe), the reticulum (honeycomb and pocket tripe), and the omasum (book/bible/leaf tripe). Abomasum (reed) tripe is seen much less frequently, owing to its glandular tissue content.

Tripe — an organ meat derived from beef stomach — has been part of British and Irish cuisine for centuries, even earning mentions in Shakespearean literature. While tripe seems like an unconventional choice compared to more common diet staples like chicken breast, it’s worth adding to your diet. Tripe is relatively low in calories, at just 96 calories per 4-ounce portion, and serves as a source of essential nutrients that benefit your health.