The Digestive System The digestive system is a system consisting of the mouth, oesophagus, stomach, gallbladder, small intestine, large intestine, the rectum and the anus. The functions of the digestive system are: • To break down food particles into molecules for digestion • To absorb into the bloodstream the small molecules produced by digestion • To eliminate un digested and unabsorbed foodstuffs and other waste products from the body The full digestive process begins at the mouth. The food enters the mouth and is chewed. This is call mastication and it gives the food a greater surface area which enables enzymes to break the food down making it easier to digest. The process of breaking down the food starts with the saliva in your mouth.
1. Why does the trachea lined with pseudostratified ciliated columnar epithelium while the alveoli are lined with simple squamous epithelium? The trachea is lined with pseudostrastified ciliated columnar epithelium because the globlet cells that are there produce sticky mucous to coat the inner lining and catch any debris in inhaled air before it gets to the lungs. The columnar cells have cilia that push mucous away from the lungs. The alveoli are lined with simple squamous epithelium because the very thin epithelium will facilitate the diffusion of oxygen and carbon dioxide.
During the motion of the bolus through esophagus smooth muscles contract behind the bolus to prevent it from being squeezed back into the mouth. Rhythmic unidirectional waves of contractions will work to rapidly force the food into the stomach through esophagus. This process works in one direction only and its sole purpose is to move food from the mouth into the stomach. In the esophagus, two types of peristalsis occur. First, there is a primary peristaltic wave which occurs when the bolus enters the esophagus during swallowing whichforces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds.
The bolus then goes to the pharynx where swallowing occurs. During deglutition in the pharynx there is a “flexible flap of elastic cartilage that’s function is to keep food out of the lower respiratory passages” called the epiglottis (Human). The bolus then goes to through the esophagus where segmentation(circular muscle contractions of esophagus that allows the bolus to mix) and peristalsis(longitudinal muscle contractions of the esophagus that allows the bolus to be push down bolus to the stomach) happens. Then it goes through “ringlike muscles that contract/close a bodily passage or opening” called sphincters (Sphincter). The bolus goes through one called the gastroesophageal between the end of the esophagus and the beginning of the stomach in order to enter the stomach.
Unlike the human digestion system, crayfish have a rather simple system. Starting with the mouth, food is ingested and passed into the cardiac stomach via the esophagus. In this first stomach food is stored until it is passed into the pyloric stomach; filled with small “teeth” like structures. Once ground the food is handed out to the intestine, where nutrient is absorbed into the blood vessels and taken around the body. After the intestine, the excess waste is removed through the anus.
Nonetheless, there are things that can be done in an attempt to prevent negative side-effects. Creatine is osmotically active.  This means that the creatine being stored in the body can absorb water from the other systems. Although this can lead to dehydration, it can be prevented by drinking water. Many creatine labels actually have suggested amounts of water that should be drank by the user.
Synthesize how might the digestive system and the circulatory system work together? Digested molecules of food, as well as water and minerals from the diet, are absorbed from the cavity of the upper small intestine. Most absorbed materials cross the mucosa into the blood and are carried off in the bloodstream to other parts of the body for storage or further chemical change. As already noted, this part of the process varies with different types of nutrients. 5.
The process of chemical digestion in the breaking down of food with enzymes so that they can become molecules such as nutrients, salts and water , so that way they are easily absorbed and utilized. The process of absorption involves moving such molecules through the GI epithelium and into the blood or lipids. Ingested food is initially broken down mechanically by your mouth into pieces that are easier to swallow, and then broken down again into even smaller pieces so that in can continue its journey through the stomach and into the small intestine. These food particles are primarily made or major nutrients and minor nutrients. The major nutrients such as carbohydrates, protein and lipids must be broken down further enzymatically in order to
This is a compound that can be confused with dietary fiber, but it's a fat absorbing property. It's like fiber in that it passes through the digestive system, removing fat along the way. Impressive, right? But what about side effects? Important Side Effects of Fat Blockers In some cases, people report diarrhea, gas, cramps among other mild to moderate side effects while using a particular fat blocker.
Some examples are the circulatory, the excretory, the muscle, and the digestive systems. For example, the digestion system is an organ system that digests the food a person eats. Some organs in the digestive system are the esophagus, rectum, stomach, liver, gall bladder, pancreas, large intestine, small intestine, and appendix. The digestive system is very important because without it, organisms would not be able to digest food. Food would just sit inside the body or go through it without the body taking any energy for fuel.