The National Science Foundationâs âTree of Lifeâ project estimates that there could be anywhere from 5 million to 100 million species on the planet, but science has only identified about 2 million.
If it were not for the stomachâs storage capacity, we would have to eat constantly instead of just a few times each day. The stomach also secretes a mixture of acid, mucus, and digestive enzymes that helps to digest and sanitize our food while it is being stored....
By Anne Marie Helmenstine, Ph.D. Your stomach secretes hydrochloric acid, but the pH of your stomach isn't necessarily the same as the pH of the acid! The pH of your stomach varies, from 1-2 up to 4-5. When you eat, the stomach releases proteases and hydrochloric acid to aid in digestion.