It helps our body to absorb all the nutrients it needs to run smoothly. A healthy digestive system in turn requires sufficient dietary fibre intake. Beyond that, our Functional Fibres nourish your colon micro flora — add a prebiotic plus.
It All Starts in Your Head In front of you is a turkey and cheese sandwich with lettuce, onion, red bell pepper, mustard and mayonnaise on multi-grain bread. The hungrier you are and the more you crave that sandwich, the more you will salivate.
This is the cephalic phase of digestion, which is stimulated by the parasympathetic nervous system. When you see and smell food and even start thinking about eating, the brain readies the digestive tract for nourishment.
This anticipation stimulates the secretion of saliva in the mouth and gastric juices in the stomach. This chewing reduces the size of the food particles and mixes them with saliva for easier swallowing.
Before your food passes from the mouth and down your esophagus, salivary amylase, an enzyme in saliva, begins to digest the starch in your bread. That is the start of chemical digestion. The mass of chewed sandwich is called a bolus. You voluntarily swallow it, but the rest of the digestion-absorption process is involuntary.
The passage of the bolus through the esophagus to the stomach occurs by peristalsis, a series of wave-like muscle contractions. Digestion in the Stomach As the bolus approaches the stomach, a ring-like muscle called the lower esophageal sphincter relaxes, allowing the chewed food to enter.
Peristalsis mixes the bolus with gastric secretions containing hydrochloric acid HClhormones and digestive enzymes to produce a thick slurry called chyme. Hydrochloric acid is so strong that it could dissolve metal. The acid kills much of the microorganisms that piggyback on your food, and in this way the acid has prevented you from frequently becoming sick.
To aid digestion, HCl denatures or unfolds proteins, making them more available to attack by digestive enzymes.
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The digestive enzyme pepsin begins to breakdown the protein in your sandwich largely the meat and cheese with smaller amounts in the bread and vegetables.
Gastric lipase begins to digest the fats present in your cheese and mayonnaise, but does so only minimally. Digestion of the starch in your bread does not occur in the stomach because the salivary amylase that began chemical digestion in your mouth became inactive in the presence of stomach acid.
Digestion and Absorption in the Intestines The Small Intestine Bit by bit, the pyloric sphincter that separates the stomach from the small intestine allows the chyme to drop into the small intestine.
Here is where most of the magic occurs. Though the stomach often gets the credit, the small intestine is the primary site for digestion, and its remarkable and expansive absorptive area allow us to harness the nutrients in our foods. Because chyme was mixed with HCl in the stomach, it has a very low pH.
The mucosa of the small intestine does not have as much protective mucus as the stomach, but it does have something else to shield it from the acid - pancreatic juices. The presence of chyme in the upper portion of the small intestine triggers the pancreas to secrete bicarbonate to neutralize the acid, lipase to digest fats, amylase to digest starches, and proteases to digest proteins.
The cells of the small intestine secrete additional enzymes to complete digestion. The gallbladder gets into the act here as well. When fat is present in the chyme as it is from the cheese and mayonnaise in our sandwichthe gallbladder contracts and secretes bile into the small intestine.
Bile acts like a detergent and emulsifies the fat, breaking it into small globules, aiding fat absorption. You need a very large surface area to absorb all of the nutrients your body requires.A dog’s mouth.
A dog’s jaws and teeth are designed differently than yours or mine. A humans jaw can move up, down and side to side. Our teeth have some pointed teeth for cutting and flat molars for grinding. The Best Enzymes For Your Digestive System. If you already know the value of digestive enzymes, the next few paragraphs may be all you need to read.
They quickly tell you about the best value in digestive enzyme supplements, and how to get it. Probiotics Side Effects. Probiotics' side effects, if they occur, tend to be mild and digestive (such as gas or bloating).
More serious effects have been seen in some people. The Digestive System Of The Human Body Words | 5 Pages. In the human body, the human digestive system is used to process food one eats by digesting it into nutrients. The body use nutrients for energy, growth, and cell repair, which are needed for humans to survive.
This digestive system encompasses a long tube that runs from the mouth to the anus. BREAD BREAD. What is bread? At its simplest it is merely a paste of flour or meal and water cooked over or surrounded by heat.
More complex breads are leavened in various ways and contain salt and other ingredients, particularly fat and sugar. Before the sandwich even leaves your mouth, an enzyme in your saliva called amylase begins to break down the carbohydrates in the bread.
When you swallow, the sandwich pieces slide down your pharynx, also known as the throat.