* teeth help in physical digestion by cutting the food into small pieces , chewing it and grinding it . * salivary glands secrete saliva which help in the chemical digestion of the food apart from making it wet . * tongue helps in mixing this broken food with saliva – which wets the food in our mouth so that it can be swallowed more easily . * saliva contains enzyme – salivary amylase which digests the starch present in the food into sugar . * because food remains in the mouth only for a short time , so the digestion of the food remains incomplete in the mouth .
The contents of the sandwich are then mixed with saliva to moisten it and to make it easier to swallow. The sandwich is formed into a bolus and the tongue pushes the bolus to the back of the throat and then it is swallowed. The saliva contains an enzyme called amylase which breaks down starch (the bread) into sugars. The sandwich passes down the oesophagus and after 3-6 seconds of leaving the mouth, the food will reach the stomach by the involuntary wave like muscular contractions, known as peristalsis. The epiglottis stops any of the sandwich entering the windpipe by covering the windpipe hole.
Mouth The mouth is the beginning of the digestive tract, digestion starts here when taking the first bite of food. Chewing breaks down the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use. Esophagus The esophagus is located in your throat near your windpipe; it receives food from your mouth when you swallow. The esophagus then delivers the food down to your stomach. Stomach The stomach holds food while it is being mixed with enzymes that continue the process of breaking down food.
Identify factors that affect the amount of time it takes for food to travel through the digestive tract - Explain how digestion occurs in mouth, stomach, small intestine, large intestine – The body starts the digestion process before food even enters the mouth. As soon as something that smells good hits the nose, the body starts to salivate and produce stomach acids. Once it enters the mouth, the body gets to work. All three salivary glands (the parotid, sublingual and submandibular) produce saliva which begins to chemically break down the food. The tongue and teeth move the food around, mixing it with the saliva, with all 32 teeth tearing and crushing it to break it down further into a softer composition called a bolus.
The digestive system is essentially a long, twisting tube that runs from the mouth to the anus, plus a few other organs (like the liver and pancreas) that produce or store digestive chemicals. What Is the Function of the Digestive System? The primary function of the digestive system is to break down the food we eat into smaller parts so the body can use them to build and nourish cells and provide energy. Structure of Human Digestive System * Mouth The mouth is the beginning of the digestive tract; and, in fact, digestion starts here when taking the first bite of food. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use.
The saliva which is contained in the mouth which is produces by the salivary glands begins to digest the food before the food is even swallowed. Saliva and the other chemicals which are produced along the way help speed up the digestive process which is called digestive enzymes. The mouth which is also known as the oral cavity is a specialized organ which receives food and breaks it into smaller pieces. The mouth is changed mechanically when biting and chewing food. In a humans mouth there are teeth and within a human they are four types of teeth which are used for different functions such as the incisor teeth are for biting and are found are the front of the mouth.
The stomach, a large muscle sack, contains three sets of glands which produce gastric fluids. One set produces mucus which coats the food, making it slippery, and it protects the stomach walls from being digested by its own secretions. The second set of manufactures hydrochloric acid, which aids in the breakdown of proteins in the beef patty in the hamburger. About four hours or less after the food has been mixed with all the gastric juices in the stomach forming a thick liquid called chyme. Most digestion, as
The body soon loses color as the blood pools in the lowermost portions of the body. The bacteria in the stomach then begin to break down the body itself while insects, maggots, and scavengers break down the skin. Over several days the brain begins to liquefy and drain out through the mouth, nose, and ears. Blisters soon form on the skin, which eventually peels off in large sheets. Researchers at the Body Farm have discovered that when the skin is soaked in warm water, it can restore its flexibility and can be used for fingerprint identification.
Super Size Me Part II 1. Morgan’s hunger and appetite changed tremendously throughout his experiment. There were many different effects that the McDonalds diet had on Morgan. After five days Morgan gained almost 10 pounds, this proves to us that he was gaining an unhealthy amount of weight in a small amount of time. After a certain period of time Morgan found himself short on energy, hungrier more often, loss of sex drive, and sometimes he would experience sickness.
A good and efficient way to lose weight, one should consume 500 calories less than normal for a week. Also instead of eating 3 big meals a day (breakfast, lunch and dinner), one should spread the meals out to 5 smaller meals a day. Metabolism can be sped up by eating one meal every 2 and a half to 3 hours. It is important to watch what is consumed. Staying away from fast foods, fatty foods (cookies, chips, candy, etc.