Essay about Journey Through the Digestive System

As you can see, it is a tubelike structure made of muscle and lined with mucous membrane. The pharynx functions as part of the respiratory and digestive system because it is located behind the nasal cavities and the mouth. It is the structure that we refer to as the throat. It is about twelve and a half centimeters long and consists of three parts; the nasopharynx, oropharynx and the laryngopharynx. (Anatomy.tv, n.d.) The esophagus branches off of the pharynx which carries food to the stomach. Swallowing takes place in the pharynx partly as a reflex and partly under voluntary control. The tongue and soft palate pushes food into the pharynx, which closes off the trachea. The food then enters the esophagus. The esophagus is a muscular tube extending from the pharynx to the stomach. . (Mohan, 2010). It is about 25 centimeters long. The production of mucus by glands in the mucosal lining as you can see lubricates the tube to permit easier passage of food moving toward the stomach. (Thibodeau & Patton, 2008). Food is pushed through the esophagus and into the stomach by a series of contractions called peristalsis. The lower esophageal sphincter is just before the opening to the stomach. It opens to let food pass into the stomach and closes to keep it there. (Mohan, 2010).

The small intestine is where the completion of the digestion and absorption of nutrients happens. The small intestine is highly adapted for the absorption; villi and microvilli. The small intestine is the main site for lipid digestion. The pancreas secretes lipases which are special enzymes that digest fats after they have been mixed with bile.

The organs needed for the dissection from the digestive system contains the liver, stomach, the small and large intestines, also the tongue. The function of the liver is to clean and detoxify the blood but also to store vitamins and iron. The function of the stomach is to receive food from the esophagus and mix food with the gastric juices. Small intestines extend from the stomach to the large intestines. It is responsible for absorbing most of the nutrients into the bloodstream.

Following from its start at the mouth, food move to the esophagus which connects the mouth to the stomach and prevents the backflow of stomach acid via the esophageal sphincter. The stomach uses hydrochloric acid, pepsin, and gastric lipase among other enzymes to break down food before it passes through the pyloric sphincter to be absorbed through the

There aren’t many compartments the food has to travel through. Food travels down the esophagus into the stomach, where it is met by stomach acid and food is broken down and passed through the small and large intestine, nutrients are absorbed, and the waste is

Today, I want to talk about bananas. This familiar yellow fruits is nutritious, delicious, and good for you. But, most importantly, there are a trillion fun facts about it on the internet. Banana Fact: “Americans eat an average of 27 pounds of bananas per person every year, making them the most popular fruit in the U.S.” Banana fact: “Research shows that eating bananas may lower the risk of heart attacks and strokes, as well as decrease the risk of getting some cancers.” Banana fact: “Banana farms use extremely harmful pesticides including diazinon and chlorpyrifos, which when consumed can cause: diarrhea, nausea, vomiting, convulsions, and comas.” Banana fact: “Tortoises and manatees off the coast of Costa Rica are facing extinction partly due to the fact that pesticide runoff from banana plantations kills the algae on which they feed.” Now you might be thinking, those things aren’t really my problem, I’ve never gotten sick from a banana and tortoises aren’t doing bad, I saw one at the zoo once. Why is any of this important? And to that, allow me to read you this sweet native american quote Ms. Barber probably found on facebook, a few clicks away from my banana facts. "Treat the earth well. It was not given to you by your

Instead the pancreatic juice, which is the most important digestive juice, contains mainly water and enzymes such as: Amylase (breaks down carbohydrates/starch into glucose), Protease (breaks down proteins into amino acids) and Lipase which breaks down lipids (with the aid of bile) into triglycerides. It also contains sodium bicarbonate able to neutralize the hydrochloric acid present in the chyme. Through the lining of the small intestine I can also see numerous “brush border" enzymes which are further breaking down products of digestion into absorbable particles; these enzymes constitute the intestinal juice and particularly digest polysaccharides transforming them in monosaccharaides (Maltase, Sucrase and Lactase), (Patton & Thibodeau, 2008). The chyme now is entering in the jejunum (the second portion of the small intestine) where digestion continues and absorption begins. I notice that the jejunum contains numerous villi but less Brunner's glands, it also presents many large circular folds called plicae circulares (Pansky, 2007). These circular folds increase the surface area for nutrient absorption; in fact the absorption of the majority of nutrients takes place here. Now the chyme and I are entering into the ileum which is the final and longest segment of the small intestine. This tract of the

Most of the solid material remaining is waste, which is compacted, stored, and eventually eliminated by the rectum-the final segment of the large intestine than stores fecal matter (solid waste). -Pancreas- The pancreas is located between the small intestine and the stomach. It produces chemicals needed as materials move between the two. The pancreas quickly lowers the acidity in the small intestine and breaks down proteins, fats, and starch.

Food is digested by being broken down, by a variety of enzymes, into useful nutrients, which are transported around the body to places where they can be of use, and into waste products, which are excreted from the body. The digestive system is made up of a number of organs, oesophagus, stomach, liver, pancreas, gallbladder, and small and large intestines, these are then separated into the digestive tract and the digestive organs. The digestive tract is, essentially, a single continuous tube that begins at the mouth and ends at the anus, in a fully grown adult it is approximately seven metres long. Food travels through the digestive tract and the digestive organs produce the enzymes and chemicals that are responsible for

After the food has gone through the stomach, it moves onto the small intestine. Food moves through it between 30 minutes to an hour. It is made up of three parts. The Duodenum, Jejunum and the Ileum. The Duodenum is the start of the small intestine. This is where bile, salts (from the liver) and pancreatic enzymes are to start to break down carbohydrates, proteins and fats. Due to horses not having a gall bladder the bile goes straight into the small intestine. The bile is important at reducing the acid from the

The esophagus receives food from the mouth after swallowing and then delivers it to the stomach. The stomach holds food which it is being mixed with enzymes which continue the process of breaking down the food into a useable form. When the contents of the stomach are processed they are released into the small intestine. In the small intestine food is broken down by enzymes released from the pancreas and bile from the liver, the food is moved through and mixed with digestive secretions. The small intestine is made up of three segments the duodenum, jejunum and the ileum, the jejunum and the ileum are mainly responsible from the absorption of nutrients in to the bloodstream. These contents start out semi-solid and end in a liquid form after passing through the organ. Water, bile, enzymes and mucous change its consistency, one the nutrients have been absorbed it then moves onto the large intestine. The large intestine connects to the rectum and is specialised in processing water so that emptying the bowels is easy.

It also helps to improve our bowel movements. A great source of fiber, eating bananas is a better option than taking laxatives to treat constipation. Bananas are also rich in fructo-oligosaccharides (FOS), which is another essential element of digestion. It is a prebiotic that feeds good bacteria living inside your digestive system. These bacteria works to help us efficiently absorb nutrients. If you are a person who gets constipated easily, then you gotta love bananas.

The abdominal cavity which contains the stomach, most of the large intestine, the small intestine, the gallbladder, spleen, kidney and liver. The small intestine is very important and its job is to digest food and also take nutrients from food to help give back to the body. The gallbladder is a small storage organ also needed in digestion and holds bile products produced by the liver until needed for digesting fatty foods. The kidney is also vital because it helps aid in essential processes such as regulating blood pressure. The liver is very vital and performs multiple critical functions to keep the body pure of toxins and harmful substances. Without a healthy liver, a person cannot survive. Then the pelvic cavity which will contain also portions of the large intestine, reproductive organs, and the urinary bladder. The large intestine is also known for helping during digestion by taking undigested food and absorbing as much water as it can and expels the waste. The reproductive organs play a vital role in the survival of our species. Lastly, the urinary bladder functions as a storage vessel. It is one of the most elastic organs and is able to increase its volume

The bile moves into the gallbladder via tiny tubes. The bile is stored in the gallbladder and waits, becoming concentrated, for the signal to be released into the duodenum aiding in digestion. Without bile, the body could not digest fats, as fats do not absorb into water. The bile acts as a detergent and allows the two to mix.

Drug absorption and metabolism are very complicated processes that involve many physiological and physicochemical factors. Adequate information about the processes determining the oral F of a drug is essential for a successful drug development process. In the recent years, our knowledge about the expression of drug-metabolizing enzymes in the intestinal wall has expanded. In addition, the availability of in vitro and in vivo data has clearly demonstrated the significant contribution of intestinal metabolism in mediating the extent of first-pass elimination and DDIs. PBPK models provide an effective and reliable tool to evaluate the role of intestinal first-pass metabolism in the prediction of potential DDIs. The use and