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You can see a negative feedback loop happens in the stomach because acids and enzymes are released from the low levels of pH in the stomach. Because the pH level is low ot begin with delta cells secrete somastian which deactivates the production of gastrin therefore resulting in the stopping of enzymes and acid production.

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Because the Stomach contains a lot of acid and has high levels of acid. The pancrease secretes a hormone called secretin. Witch pretty much activates the production of sodium bicarbonate. Then a buffer is then used to neutralize the stomach's pH level to make it less acid. (The buffer does have a limit)

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A positive feedback loop is seen when Amino acids are in the stomach. They cause the acid and pepsinogen to release by the parietal and chief cells. But because these cells are used to break down proteins so therefore there is more amino acids being made. More amino acids causes there to be more gastrin released and that means these is an increased production rate of acid and pepsinogen.

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Metastasis is when cancer spreads really fast over the body.

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An endoscope is a medical tool with a light attached to it that is used during a colonoscopy to look inside an organ and interest it way through the anus.

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Stage IV occurs when cancer cells spread to other organs or cells. It may be also called advanced or metastatic cancer. This is the worst and last stage in cancer.

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Mechanical Digestion is the last steps in the digestion process and mechanical digestion is occurring using the smooth muscles on the patistalis.

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The main form and function and job of the large intestine is to absorb water and electrolytes into the bloodstream using the process of osmosis. The large intestine absorbs vitamins because of the bacteria compacting all the fecal matter.

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A negative feedback loop can be seen when there is a lot of bacteria in the intestines the high amount of bacteria is sensed by the cells and activates a peptide to kill the baters. This starts to regulate and control the population in and around cells and helps to stop and immune response.

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The colon holds bacteria and creates a lot of vitamins for the body. The colon also helps to absorb nutrients into the blood.

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A colonoscopy is a procedure that everyone does it is where an endoscope goes and looks for the colon and removes/cuts out any polyps. Colon cancer can be prevented so long as you get rid of the polyps on time, If you wait to long the polyps can become huge in the later stages and even become deadly if not treated.

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The colon contains cancerous cells which could lead to death called a polyp. A polyp is a small tissue that starts as a small bump but then has a fast progresses in stages (stage 4 being the worse).

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Absorption and Diffusion occur in the small intestines, creating a negative feedback loop. After a person eats something with glucose inside of it. That glucose is diffused into the bloodstream creating high blood sugar levels. When there is high blood sugar levels the Pancreas activated to produce insulin which is then used to bring glucose into and of the bloodstream. When the Blood Sugar is at a normal level again the pancreas holds its insulin production.

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The Lymph Vessels are now a lacteals their job is to absorb large molecules of fats and lipids as they move throughout the small intestine.

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The capillaries inside the villi move broken down nutrients that was absorbed by the villi through the bloodstream that is its job.

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The small intestine has villi, one of the main. jobs that villi do is increase the surface area of the small intestine, Meaning the small intestine can absorb more.

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Food molecules contain nutrients that nutrients is absorbed as it moves through the small intestine. Those nutrains are diffused through the intestine wall into the bloodstream. The selective permeability happen and only some molecules are able to get through/diffuse because they are the right shape and size.

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Microvilli are within the villi they job is to increase the surface area of the small intestine in order for more absorption to be able to occur. The surface of microvilli contain a lot of enzymes that help break down complex nutrients into smaller parts.

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The Villi job is to absorb nutrients vitamins and minerals that are going to pass through the small intestine. They increase the surface area of the small intestine as well and more surface area means more absorption will happen.

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Amino acids stimulate the secretion of gastrin

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Somatostatin is a hormone that reduces the amount of gastric secretion (meaning it turns off G-cells)

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Delta Cells are activated when there is a low pH which then makes them produce the hormone Somatostatin witch shuts of or in other words deactivated the G-cells.

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Foveolar Cells stimulate Mucus and then that Mucus helps to protect the inside of the gastric pit.

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Lipase breaks lipids into their specific monomers.

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Pepsin breaks down protein into amino acids.

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Chief cells produce enzymes and replaces them every couple days.

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Hydrochloric Acid is an extremely strong acid that is in the stomach.

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Parietal cells are stimulated by the gastrin and are created by the G-Cells.

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G cells make a hormone called gastin to start the chemical digestion.

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The stomach also uses chemical digestion which starts with many enzymes on the stomach which all come from the gastric pits and chemical digestion starts in the brain.

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Chyme is a very acidic fluid that contains gastric juices and also contains some of the digested food travels to the small intestine.

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Gastric pits are pores in the stomach that have enzymes used for and during chemical digestion. They contain cells which produce hormones.

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The stomach churns and breaks down food The form and Function of the stomach is very important it is a sack made out of muscle so that it can move and churn to break down nutrients that comes through.

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Carbohydrates are broken down into glucose fructose and galactose and are then absorbed into the bloodstream and into the small intestine.

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Fats are broken down into fatty acids and monoglycerides when the Pancreatic lipase enters the small intestine.

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Proteins are eventually broken down into dipeptides and amino acids which then get used for absorption in the small intestine.

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Emulsify a fat molecule means to break it apart to expose more surface area.  Fats are really dense molecules, so the more surface area lipase has to work on the more efficient the process becomes overall.

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A buffer is used in the Stomach a buffer is a sponge like material that soaks up stomach acid and neutralizes it. (however buffers do have a limit which is important to remember) meaning it can only take in a certain amount of acid.

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Stomach acid is used to break down food through the process of chemical digestion.

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The Bile is a digestive fluid that emulsifies certain things to break it down. The Bile emulsifies to make to make sure the surface area on fats gets bigger to that it is easier for Lipase to break down. Lipase used in the bile breaks down fats and lipids into glycerol and fatty acids.

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The Gallbladder is the storage section that the small intestine has to store liquid called Bile which helps the digestive process.

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Lipase is released from the pancreas and it later in digestion absorbs fats.

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Trypsin is a pancreatic enzymes found in the pancreas that is used to quickly break down proteins into amino acids.

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Amylase uses the process of hydrolysis to break down starch into glucose which is later used for energy.

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The Pancreas is made up of enzymes called pancreatic enzymes used to speed up and start the process of breaking down nutrients.

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Sodium bicarbonate is secreted from the pancreas in order to make sure the Duodenum is protected.

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The liver's job is to breakdowns nutrients like proteins fats and Carbohydrates

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The doudulu takes in nutrients and is the connection that is in between the small intestine and the stomach.

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When food is placed into the mouth, Saliva begins in order to start breaking down starch and turning it to glucose. Silvia also helps to make the food more slippery so it movers easier down the digestive tract. Once the food is swallowed no more food is getting into the mouth and there is less saliva created so overall the amount of saliva decreases. Creating a negative feedback loop.

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Music is protective to the body's digestion process is gets the bolus wet and lubricated to it is smooth and flows faster and easier.

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The Epithelial cells protect cells in the body. They protect muscles that are used during digestion.

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The peristalsis is used with smooth muscles that surround the esophagus.  When swallowing they contract in a wave like motion that pushes the bolus down to the stomach.

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The Smooth muscles are a major part to this digestive process they are used through to help the bolus flow better through the parts of the throat into the stomach.

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The esophagus in below the mouth on the way down to the stomach and after are food is swallowed using the hard plate the food travels through the esophagus

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The food is then swallowed and the hard plate in the roof of our mouths is used in this process to arure everything goes down the esophagus and not somewhere else.

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The bolus consists of the food we broke down and chewed up a lot of that food has saliva on it from the mouth and salivary glands.

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An enzyme that is made through the salivary glands its function is to break down starch into glucose.

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The Salivary glands are in the mouth and then get the food we eat wet and most before it is transported so that it can move faster and smoother along the digestive process.

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There is a lot of different shaped teeth in our mouth that have different shapes for different functions to break down are food. When we chew food it gets chopped up by the teeth then the tongue come into play.

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Chemical Digestion in the Small Intestines 

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Chemical Digestion in the Small Intestine 

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Chemical Digestion in the Small Intestine 

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Chemical Digestion in the Small Intestines 

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