Explain the digestive system and how each part of the system works?

food is introduced in the mouth in a process called ingestion and chemically broken down in the process known as mastication.

The mouth contains saliva which has mucus that lubricates the mouth, it also has salivary amylase and water which acts a solvent.

The toungue roles the food into bolus and pushed down the pharynx in a process known as peristalsis.

Then the food enters the stomach through a muscle known as Cardiac sphincter. In the stomach there are muscular contractions which converts the food into chyme.

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false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

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