The Mouth Is Where It All Begins

What are the three sections of the large intestine and what roles does each play in digestion or absorption?

triggers the opening of the ileocecal valve, allowing materials to pass from the small intestine into the large intestine.

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

digestive juices to become thick and sticky, plugging up the tubes, ducts, and passageway. It

The oral cavity is very important when dealing with the digestive system. Digestion begins when food enters the mouth and is mechanically broken up by the chewing movements of the teeth. The tongue moves food around the mouth to be mixed with the saliva. Saliva contains digestive enzymes to break down carbohydrates and slippery lubricants to make food easier to swallow. Without a properly working oral cavity, food would be difficult to eat and digest to get the proper nutrients the body needs.

I chose the oral cavity to describe for this discussion board. The oral cavity ingests, chews, and swallows the food so that it may enter our bodies. The oral cavity is the place where digestion begins. Before it goes anywhere in the body it has to enter our mouths first so that it may be mechanically broken down with the help of our teeth and saliva. Saliva contains digestive enzymes that help break down the food particles so that it's easier for us to swallow. Hanging at the back of the throat is the uvula which is there to serve for more than one purpose. The first purpose being it has a role in speech production, and the second one being the gag reflex. The reflex is stimulated when food enters the throat without swallowing. This prevents

Attachment points for the muscles of the head and neck are located on the exterior surfaces of the skull and allow for important movement like chewing, speech, and facial expressions. Teeth are rooted into deep sockets in the mandible and maxillary bones. The upper portions of the digestive and respiratory tracts are also housed within the hollow oral and nasal cavities of the skull.

the tissues above the upper jaw or between the nose and the upper corner of the lip and

For example, digestive enzymes aid in the digestion of food, so that food may be broken down

The American Dental Association has stated that your gums, teeth and mouth play an important role in the digestive process. They are necessary for chewing and swallowing, which are the first parts of digestion. The foods you eat not only affect your general health, but they also affect your gums and teeth. In fact, your mouth will probably be the first part of your body to show any signs if your nutrition is poor. Here are tips for eating to improve your dental health:

Our colons are populated by a large colony of bacteria, which assists in the final stages of digestion

Then we have the esophagus, where there is secretes mucus to help w/ lubrication, allowing food to continue moving down esophagus. The small intestine instead contains brush border, folded mucosal tissue (villi) that enhances absorption. The brush border contains "brush border enzymes" - final stage of chemical digestion in digestive tract. The large intestine Contains intestinal flora bacteria and moves food toward rectum. The digestive enzymes instead are: Pepsin (ogen) enzyme breaks down proteins; pepsinogen becomes pepsin once comes in contact w/ HCl. Pepsin is enzyme that actually breaks down chime. Gastric lipase enzyme, which breaks down fats and the Intrinsic factor that facilities absorption of Vitamin-B12, necessary for cell mitosis. Then we have carbohydrates, which When its consumption is inadequate, protein is broken down to make glucose to maintain a constant blood glucose

The cheeks are composed of subcutaneous fat, covered with outer skin. The fat is atop the facial muscles responsible for assisting a person for speech, the chewing of food in the mouth and facilitating facial expressions. Moist stratified squamous epithelium line the inner layers of the cheeks. The opening of the oral cavity is formed by the meeting of the anterior regions of the cheeks and the posterior region of the lips. The lips are responsible for manipulating speech-related functions. One of the most easily movable organs of the human body, the lips are primarily made up of flesh. The lips are also in charge of helping the teeth process the food, transport the food into the mouth, and making it possible for infants to suck milk during infancy.

The digestive system are the collection of organs that work together to break down food into nutrients so that it can be absorbed into the blood. This systems consists of four main steps which include ingestion, digestion, absorption, and egestion. The mouth is responsible for carrying out the first step which is taking in the food. The salivary glands, pharynx, esophagus, and the teeth are responsible for the second step as they are responsible to break down the complex food molecules into smaller molecules. The absorption of the food is done by the stomach, the liver, the gall bladder, and small intestines. These organs are responsible for absorbing the digested nutrients and transporting them to the bloodstreams. Finally, the last step, the egestion, is done by the large intestine, rectum, and anus. These organisms are responsible to remove the waste food materials from the body.

First steps in the digestive system take place in the mouth, including our lips without them food and saliva would just fall out and it would be very disgusting. As the teeth cut, tear, and grind the food down into small, teeny-tiny pieces so that it can fit down the throat, which then will continue throughout the digestive system. Without our teeth we would simply choke on all of our food constantly and would not survive. There are several types of teeth in the ordinary human mouth,usually in a full set of permanent teeth there are in total thirty-two teeth. The different types of teeth do different things, Like the incisors that are adapted for cutting. Like when you are chewing let 's say some chicken these help to cut the chicken up into smaller bits.The eye-teeth or Canines are used mostly for piercing the food. The premolars and Molars have a broader shape and are used to grind and really break up the chicken that you are eating. Some people without teeth often get their food blended or eat soft foods that can go down quickly and easily.