Digestive Lab Report

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.

Digestion starts in mouth and it is going through several steps. Teeth which are a Mechanical digestion start tearing and crushing the food down into small pieces so that the food will smoothly run down our throat. The salivary glands are located underneath the back of our tongues and that’s what is creating our saliva. The saliva is the Chemical Digestion is helping soften the food in the mouth so it is easy to swallow. Also saliva is the first out of several chemicals that is breaking the food into smaller bits. The tongue is the muscle that works with the food and saliva to form something similar to balls that can be swallowed. Also tongue contains taste buds so that we know if the food is salt, sweet, sour or bitter. Esophangus is a simple transportation tube that is joining the throat with stomach. When swallowing we are closing a trap door in our throats called the epiglottis. By closing this trap we are preventing the food prom going to trachea and into our lungs. Also Food moves down the esophangus using muscles not gravity. Stomach is the first stop after the Esophangus. When the food gets into stomach the stomach uses chemicals to try to make the food smaller. These chemicals are called gastric juices and they include hydrochloric acid and enzymes. (Enzymes are

Digestion is a complicated process that uses many different processes to digest food efficiently. It is necessary for not only us but for almost every organism. A major part in digestion is pH or how acidic or basic a substance is. pH helps digestion happen, the question is for the Stentor and the Rotifers at what pH ranges does their digestion occur? We will test that by using pH indicators, and observing the digestion happen under the microscope.

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

Gulp. Your favorite food, right in front of you. Mouth watering and eyes glued to the plate. A big inhale and the smell is even better than it looks. You just cannot wait to dive in and devour it, but how does one recognize what your favorite food is by just a sniff? Or what happens after you chew and swallow that meal? Mary Roach,“America’s funniest science writer”, will take you through the gates of the digestive system and explain everything one would ever want to know and more about what happens in the depths of the alimentary canal.

Thirty seconds ago I was in my blueberry bush as a blueberry enjoying the sun, but now I am in the mouth of the human, in the process of being digested. The enzymes in the saliva started to chemically digest me, at the same time I was being mechanically torn and crushed by all thirty two teeth. Teeth are used to break down large pieces of food into smaller pieces so it is easier to digest. I was now going down pharynx and moving my way into the oesophagus. I saw the epiglottis close up as I was being pushed down, in a way called peristalsis. Peristalsis is the contraction and relaxing of muscles which push food. I continue my way down the oesophagus and find myself in contact with the gastric juices found in the stomach. The gastric juices

Inflamed tissues from Ulcerative Colitis (UC) patients show increased oxidative and nitrosative damage, leading to accumulation of mutations and dysplastic progression27,28. Infiltrating leukocytes from these patients have increased ROS production in basal conditions and in response to different ligands29. Since TLR4 mediates ROS production in leukocytes22, it is easy to speculate that immune cells drive pro-tumorigenic effects of TLR4. However, bone marrow-transfer experiments in our lab demonstrate that non-immune TLR4 participates in development of neoplasia8. Furthermore, we have shown that epithelial TLR4 activation predisposes to colitis and CAC6. To understand the role of epithelial TLR4 in neoplasia, our research has focused on the

Digestive System Test Date _______ Name ___________________________________________ Ch ____ Quiz __________ Activity _____ Test _____= 1 ____________________the part of food your body needs? 2. ________ _ needed for growth, repair tissue? 3.

The digestive systems starts as food begins to enter the oral cavity through the mouth. As digestion continues the tongue plays an important role by pushing broken down food from the secretions during the chemical reaction of salivary glands releasing amylase from mouth to the oropharynx. The oropharynx reactions with epiglottis, which a flap that closes during digestion to make sure food does not enter windpipe. The glottis is the opening that goes to lungs, if food enters the oropharynx it would make the epiglottis fold back whenever the glottis is closed food is allowed to go into the esophagus. There are two sphincters of the esophagus, the upper and lower esophageal sphincters. The upper esophagus is concluded of a buddle of muscles who

Pick your favorite food. Describe what happens to it as it passes from your mouth to your colon. What are the major steps along the way: My favorite food being watermelon will go on a relatively quick trip through the digestive system. The first obvious stage is when the watermelon enters the mouth, inside it is crushed by the teeth into an easy to swallow state of basically being water. When it hits the bottom of the stomach, cell signaling will being and trigger the gastric juice to begin digesting it further. Almost all the the sugar will be injected into the blood, and anything left over will be further broken down to be stored or

A fecal sample inside a swab tube was obtained and stored at -20 C until DNA extraction. DNA was extracted from the sample using the Eppendorf EpMotion 5075 robot obtained from Eppendorf’s main website. Fecal samples obtained were taken out of the -20 C and placed to thaw. 20 microliters of Broad-spectrum serine protease; endopeptidase K and 20 microliters of lysozyme were added. Samples were then placed in a freezer at -80 C for thirty minutes and then taken out to thaw at 40 C for sixty minutes a total of 3 times. 75 microliiters of sodium dodecyl sulfate was then added to the samples and left to incubate in a 65 C water bath for 120 minutes.

Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the

Now that the food has been chewed well, it is now swallowed into esophagus. Esophagus is a long tube which acts as a path to the main digestive organ: the stomach. However, it is important to note that it's not just a carrier of the food but also a digestive organ itself. The enzymes secreted in the esophagus further facilitate the digestion process. The esophagus is a long muscular tube. I can feel its rhythmic motion while I am moving down the tube along with the food. This rhythmic motion helps the food to reach the stomach. I can't help noticing the gall bladder while passing by the liver while entering into stomach (Netter, 2006).

Most of us think that the process that takes place in our stomach after we eat a meal it’s very easy and simple when the truth is that it’s a very complex process. The process of digestion starts even with the simple thought of food, after that the body starts preparing the stomach for the food that is about to be eaten. The food goes then through our mouth into our stomach, where is digested and dumped into the intestines to be thrown away. In order for our stomach to digest the food completely, it has to go through three different stages and that’s where the process of digestion occurs. The first stage it’s called cephalic phase, in this stage or phase, the brain perceives any sight, smell or taste of food, sending impulses to the brainstem

Label the 3 test tubes with your initials and number each 1,2, and 3. (This allows for them to be distinguished)