Explaim two interrelationship between digestion and absorption?
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Digestion and Absorption
Mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use.
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Key Points
Food is ingested through the mouth and broken down through mastication (chewing).
Food must be chewed in order to be swallowed and broken down by digestive enzymes.
While food is being chewed, saliva chemically processes the food to aid in swallowing.
Medications and harmful or inedible substances may be ingested as well.
Pathogens, such as viruses, bacteria, and parasites, may be transmitted via ingestion, causing diseases like hepatitis A, polio, and cholera.
Key Terms
ingestion: consuming something orally, whether it be food, drink, medicine, or other substance; the first step of digestion
bolus: a round mass of something, especially of chewed food in the mouth or alimentary canal
mastication: the process of chewing
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