In summary, your stomach breaks your food into smaller pieces and mixes it with all of the above secretions in mechanical digestion. Parietal cells secrete hydrochloric acid and intrinsic factor. Chief cells secrete pepsinogen, chymosin and gastric lipase.
IM 14 And have been biting the insides of my cheeks and lip for years now. Itâs a habit that I just canât break. Iâve been told that sense I have ADHD its a reason that I do it, but Iâm not sure if thatâs true.
Canker Sores Aren't the Same. Cold sores usually appear on the lip; canker sores affect the inside of the mouth. Canker sores aren't caused by the herpes virus and aren't contagious. No one knows what causes them. Cold sores generally start with red, irritated skin. Blisters form, break open, and crust over before healing.