The digestion of starch begins in the mouth. Saliva contains an enzyme that digests starch before it enters the stomach. This makes the starch easier for the body to metabolize, providing the body with energy just a litt... More »

When starch, a polysaccarhide, is digested, it is finally broken down into monosaccharides (glucose, galactose and fructose) in the digestive system. Starch provides nutrients to the human body that must be broken down i... More »

There is little to no digestion of starch in the stomach because the necessary enzymes do not function well in an acidic environment, according to class materials from the University of Maine. Salivary amylase, an enzyme... More »

Lipid digestion begins in the mouth, where an enzyme called lingual lipase starts to emulsify, or separate, the fats. Lingual lipase is a component of saliva and is released by the salivary glands. Because lipids aren't ... More »

Humans are unable to digest cellulose because they do not have necessary enzymes required for cellulose digestion, nor do they have symbiotic bacteria to perform the digestion for them; they can digest starch because the... More »

Chemical digestion begins in the mouth. The salivary glands of the mouth secrete the enzyme amylase, which begins to break down the bonds of starch found in foods. More »

Primary succession can occur after geological events, such as a volcano eruption that emits lava flow, or glaciers that recede. In both of these cases, a new land emerges that may contain rocks but is devoid of soil and ... More »