The digestive system is divided into two main
The digestive system is divided into two main
Nerve signals tell the brain what is the right thing to eat such as temperature and size and then causes saliva to be produced and moistens the food and forms the bolus which is then pushed down the throat after the CNS send the signal to contract smooth muscle…
One of the final portions of the digestive system. Includes the anal canal, rectum, colon, and cecum. Takes care of absorbing any water left in the food that hasn't been digested yet, and then passing any unused waste from the body…
The gastrointestinal tract starts with the mouth, which leads to the gullet via the stomach, small intestine, large intestine, and ends at the anus. In due course of the journey, the ingested food is broken down by both physical and chemical means to release nutrients which are absorbed into the blood stream. The ingested food is physically broken down in the mouth by chewing so as to reduce its size for increased surface area over which enzymatic reaction will take place. Enzymatic reaction is known as digestion and this is defined as the chemical breakdown of the ingested complex food molecules by the action of biological enzymes, into simplest form that can be absorbed into the blood stream and assimilated into living cells. In human beings, various components of the ingested food are digested and absorbed at various sections of the alimentary canal .…
During the process of absorption, nutrients that come from the food, including carbohydrates, proteins, fats, vitamins, and minerals, pass through channels in the intestinal wall and into the bloodstream. The blood works to distribute these nutrients to the rest of the body.…
Digestion begins in the mouth. A brain reflex triggers the flow of saliva when we see or even think of food. Saliva moistens the food while the teeth chew it up and make it easier to swallow. Amylase, which is the digestive enzyme, found in saliva, starts to break down starch into simpler sugars before the food even leave the mouth. The nervous pathway involved in salivary excretion requires stimulation of receptors in the mouth, sensory impulses to the brain stem and parasympathetic impulses to salivary glands. Swallowing his food happens when the muscles in his tongue and mouth move the food into his pharynx. The pharynx, which is the passage way for food and air, a small flap of skin called the epiglottis closes over the pharynx to prevent food from entering the trachea and causing choking. For swallowing to happen correctly a combination of 25 muscles must all work together at the same time. After being chewed and swallowed the food enters the esophagus or gullet is the muscular tube in vertebrates through which ingested food passes from the throat to the stomach. It connects the pharynx, which is the body cavity that is common to both the digestive and respiratory systems behind the mouth, with the stomach, where the second stage of digestion is initiated. The esophagus is a long tube that runs from the mouth to the stomach. It uses rhythmic wave like muscle movements called peristalsis to force food from the throat into the…
Solid food and liquids are carried from the pharyngeal region to the stomach by the:…
|food leaves your mouth it travels down the Pharynx to the Esophagus swallowing Peristalsis until the food gets to the small |…
The digestive system is the physical ad chemical breakdown of food. Following ingestion, food and fluids are processed by the digestive organs so that nutrients can be absorbed from the intestines and circulated around the body. Any residue of food that is not digested is solidified and eliminated from the body in the form of feces. (P.207)…
Mastication- first step. Enables mixing with saliva to form bolus to be swallowed. Regulated by CNS.…
Exercise 8: Chemical and Physical Processes of Digestion: Activity 1: Assessing Starch Digestion by Salivary Amylase Lab Report Pre-lab Quiz Results You scored 100% by answering 6 out of 6 questions correctly. 1. The substrate for amylase is You correctly answered: e. starch and carbohydrate. 2. Which of the following is true of enzymes? You correctly answered: c. Their activity can be affected by temperature and pH. 3. The reagent IKI tests for the presence of You correctly answered: a. starch. 4. Which of the following is not true of controls? You correctly answered: d. A negative result with a positive control is required to validate the test 5. Which of the following is an end product of starch digestion? You correctly answered: e. maltose and glucose 6. Hydrolases are enzymes that break down large molecules into smaller subunits through the addition of _____________. You correctly answered: b. water…
Tongue: It’s supplied with a number of muscular valves. That control and direct the amounts of food through the Digestive tract.…
Food begins its journey through the digestive system in the mouth, also known as the oral cavity. Inside the mouth are many accessory organs that aid in the digestion of food—the tongue, teeth, and salivary glands. Teeth chop food into small pieces, which are moistened by saliva before the tongue and other muscles push the food into the pharynx.…
The absorbed substances are then moved through the blood vessels to different organs of the body where they are used to build complex substances, such as the proteins required by our body. The food that remains undigested and unabsorbed passes into the large intestine where very small amounts of nutrients are absorbed. The food then exits your body through the rectum or anus.…
Once I have taken a bite out of my delicious favorite meal, the digestive system gets to work. It all begins in the mouth, chewing the food small enough to swallow. Salvia is squirted into the food to moisten and soften the food. Salvia contains enzymes, which break down the starches in food. Once the tongue forms the food into a ball to be swallowed, it is sent down the pharynx. The pharynx contains sphincters that help keep your food down once you swallow. Next, it makes its way to the esophagus, which is simply a transportation tube from the mouth to the stomach. It then reaches the stomach, which uses chemicals to make the food particles tinier. These chemicals are called gastric juices and include hydrochloric acid and enzymes. Once the stomach mixes with the chemicals, it is formed into a cream-like liquid called chyme. The gallbladder takes over from here hitting the food with more chemicals, one of them called bile. Bile is mixed with our food breaking down the fat into droplets, which will supply us with energy later on. From there, the pancreas uses digestive juice to break down…
This process of altering the chemical and physical composition of food so that it can be absorbed and used by body cells is known as digestion, and it is the function of the digestive system…