why can't the human stomach digest plastic but can digest metal?

Subject:
Integrated Science
Author:
aditya
Created:
1 year ago

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One of the digestive organs in the stomach that is crucial to the process of digestion is the stomach.

The gastric cavity, also known as the ventriculus in Latin, secretes gastric sap, which is made up of stomach acid (HCI), pepsin, lipase, renin, and gastrin. The glands on the inner stomach wall create gastric sap. Hydrochloric acid, or HCl, is the chemical name for the substance that makes up stomach acid. These substances contain acid. Stomach acid contains roughly 0.5 percent of the entire gastric sap as HCl.

The aiding of the absorption of water, protein, and pepsin is another function of stomach acid. In addition to aiding in food digestion, stomach acid also prevents bacteria from moving farther into the gut. The hydrochloric acid in kim, an already refined food, will be neutralized by sodium bicarbonate in the twelve-finger intestine after passing through the stomach.

Since HCl has an acidic pH of roughly 1-3, it can also shorten the pylorus, which is the last duct in the stomach that connects it to the small intestine. In order to determine how acidic or alkaline a solution or other object is, the pH scale is used.

With this level of acidity, it is quite possible to be able to burn materials made of iron and steel.

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Author:

rodrigo366
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Q. Why can't humans digest plastic?A. For the very same reason we, along with herbivores and termites, cannot digest cellulose and many other natural polymers, while being able to successfully digest amylose and glycogen, among others.The human digestive system didn't evolve the required enzymes to break the covalent bonds of these synthetic polymers despite physical digesting occurring in the oral cavity prior to the substances entry into the gastrointestinal tract. Our enzymes don't fit, like a key into a lock, many natural and synthetic polymers, rendering said materials indigestible. This is why certain organic polymers can be safely implanted into humans. The most widely used long-term implantable plastics include polyethylenes, polyetheretherketones (PEEK) and bioabsorbables—polylactic acid (PLA), polyglycolic acid (PGA) and their copolymers.

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miasyha3k
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why can't the human stomach digest plastic but can digest metal?

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