I can think of 5 off the top of my head. Cardiac Sphincter at the top of the stomach. Pyloric Sphincter at the distal end of the stomach. Ileocecal Valve that separates the Small and Large intestines and the Internal and External Anal sphincters.
The alimentary canal features several sphincters that regulate the passage of food and waste. Key sphincters include the upper esophageal sphincter, which controls the entry of food into the esophagus; the lower esophageal (cardiac) sphincter, which prevents acid reflux from the stomach; the pyloric sphincter, regulating the exit of chyme from the stomach to the small intestine; and the anal sphincters, which control the expulsion of feces. These sphincters play crucial roles in digestion and maintaining the integrity of the digestive tract.
When sphincters relax, they allow the passage of substances through the openings they control. For example, when the lower esophageal sphincter relaxes, it permits food to enter the stomach from the esophagus. Similarly, relaxation of the anal sphincter allows for the expulsion of feces. This relaxation is a crucial part of various physiological processes, including digestion and elimination.
Sphincters prevent material from flowing backwards, like the pyloric sphincter in the stomach.
During digestion the enzyme in saliva works on cooked food
The 2 answers I found were, sugars, and carbohydrates.
Neutralize chemical reactions during digestion
During digestion, lipids are broken down into fatty acids and glycerol.
During digestion, lipids break down into fatty acids and glycerol.
One product formed during the digestion of triglycerides is fatty acids.
external digestion..........
yes !
sphincters