Respuesta :
Answer:c. small intestine
Explanation:in humans, digestion is extracellular.specific parts of the digestive system has specific functions.digestion involves the mechanical breakdown and chemical breakdown of food.
These chemicals called enzymes requires specific conditions to be effective.the salivary glands found in the mouth is the first enzyme that food encounters in the digestive system.this gland produces amylase which acts starch.
The stomach mixes food mechanically with enzymes such as the gastric juice containing pepsin.
Digestion initiated in the stomach continues in the intestine,here pancreatic juice from the pancreas and bile from the liver acts on ingested food.
In humans, chemical digestion is accomplished by enzyme action that begins in the mouth and ends in the small intestine.
The small intestine is a tube that extends from the stomach to the large intestine in its first portion (duodenum) receives the secretions of the intestinal glands, the bile and the juices of the pancreas.
- These secretions contain a large amount of enzymes that break down food and transform it into simple soluble substances, such as amino acids, to be absorbed.
- The next section (jejunum) absorbs the substances of the “chyle” (milky body fluid formed by bile, pancreatic juice and emulsified fats).
- The transit to the ileum continues, which fulfills secretion, absorption and motility functions, which complete the processing of nutrients.
Therefore, we can conclude that in humans, chemical digestion is accomplished by enzyme action that begins in the mouth and ends in the small intestine.
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