The digestive process begins in the mouth, known as the oral cavity, where food enters. Chewing breaks the food into pieces that are more easily swallowed, while saliva mixes with food to dissolve food molecules. After that the tongue pushes food toward esophagus. The esophagus is a muscular tube extending from the pharynx to the stomach. By means of a series of contractions, called peristalsis, the esophagus delivers food to the stomach.
Enzymes help chemically break down large nutrients, proteins, fats and carbohydrates into smaller forms of amino acids, fatty acids and simple sugars (Encyclopedia Britannica Online School Edition, 2011). Amino acids and fatty acids are mainly where we get our energy from. The whole process starts when we eat and our metabolism breaks down the food. The amino acids and fatty acids are absorbed into the blood where once they attach to a cell, they are then able to speed up the chemical reactions taking place while the amino and fatty acids are monitoring the reactions in the cell some energy is released. This energy can be stored in the body until it is needed (Encyclopedia Britannica Online School Edition, 2011).
By contracting and relaxing, the pyloric sphincter can hold food back or let it through. The duodenum is the main part of digestion in the gut. Pancreas The pancreas is an accessory organ that produces many digestive secretions and hormones. The hormone that stimulates the pancreas is called secretin. The pancreatic juice flows from the pancreas to the duodenum via the pancreatic duct.
The digestive system process begins at the mouth and finishes at the anus. This system includes the mouth→ pharynx→ salivary glands→ larynx→ oesophagus→ stomach→ liver→ pancreas→ duodenum→ small intestine→ large intestine→ rectum→ anus. Digestion is the breakdown of food that allows the body to absorb the food into the bloodstream and into the cells for energy. This happens mechanically and chemically, mechanically means by your teeth, tongue and gums so chewing food. Whereas chemically means by the digestive enzymes; amylase, protease and lipase.
You get these nutrients from the foods you eat. Once the food goes through the jejunum, it goes into the last part of the small intestines, the ileum. The ileum is the longest part of the small intestine. It ends at the ileocecal valve. The ileocecal valve controls the passage of food from the ileum into the cecum of the large intestine.
These enzymes include trypsin for protein digestion, amylase for carbohydrate digestion, and lipase for fat digestion. When the food passes through the duodenum, the digestion is complete.From the duodenum, the chyme passes to the jejunum and ileum, where tiny finger-like objects called villi, cover the walls. These villi start the absorption of food. During the absorption, food molecules enter the blood stream through the walls of the intestine. From the small intest... ... middle of paper ... ...um often affects the amount or frequency of one’s bowel movements.
The acidic saliva (pH 6.35-6.85) secreted by these glands is composed of water, salivary α- amylase (ptyalin), chloride ions, buffer in the form of bicarbonate and phosphate, IgA and lysozyme. Saliva breaks down carbohydrates and lipids in the mouth (de Almeida et al, 2008). The pharynx. The pharynx or the throat forms a common passage for food and air. The epiglottis closes the tr... ... middle of paper ... ... secrete enzymes pepsinogen and renin, which break down the unfolded proteins.
The pharynx is also known as the throat. In this step the tongue helps to form the food into a ball and push it down the back of the throat and into the esophagus (Robinson, 2014). The third step in the digestive system involves the esophagus. In this step the food move through the esophagus by a process called peristalsis. The esophagus is a long muscular tube that goes from the pharynx to the stomach.
The longest part of the colon, the transverse colon, is where the most absorption within the large intestine takes place. The descending colon transports feces from the transverse colon to the sigmoid colon. The descending colon walls also absorb water, nutrients, and vitamins from the feces, and can store the feces until it is read to be eliminated. The sigmoid colon can also
With just the presence of those Cheetos in your sight, the digestion process begins in your 9 meter long digestive tract. Crunch, Crunch, Crunch. As you munch on those first few Cheetos the digestion process begins in your mouth. Here, mechanical digestion begins to reduce the size of the Cheeto and mixes the food particles with saliva. The tongue helps mix and move the pieces of Cheeto throughout the mouth.