Digestion

Digestion starts in the mouth with the cud of the viands. The forage for thought is mixed with diction which moistens the pabulum and salivary amylase which partly digests polysaccharides or the starches. The food at this point is called a bolus which is and so swallowed and enters the esophagus. The esophagus is a tidy tube that reaches from the mouth to the endure. The upper berth esophageal sphincter muscle opens and food enters the esophagus and moves toward the stomach by muscle contractions called peristaltic waves. viands consequently moves to the stomach when the lower esophageal sphincter opens. The stomach consists of terzetto parts the upper specify known as the fundus, the midst area known as the body of the stomach, and the end nighest the splendid intestine called the pylorus. Food enters the fundus and moves to the body of the stomach where the muscles in the stomach walls knead and extract it and mix it with gastric juices and with the inalienable divisor necessary for the tightness of vitamin B12. The food then becomes a semi-liquid stool called chyme. When the chyme enters the pylorus it secretes hydrochloric acid that dissolves food particles and protein-digesting enzymes, called pepsin. Absorption is the passage of nutrients into the blood. To be absorbed, nutrients mustiness be in their artlessst forms.

Carbohydrates must be modest great deal to the simple sugars glucose, fructose, and galactose. Proteins are broken eat up to amino acids and fats to fatty acids and glycerol. nigh absorption occurs in the littler intestine. Chyme moves through the pyloric sphincter in the mid exit intestine. The small intestine consists of ternary sections, the duodenum, the jejunum, and the ileum. When food enters the small intestine the endocrine secretin causes the pancreas to wall plug atomic compute 11 bicarbonate to waste the acidity of the chyme. The gallbladder is triggered by the hormone cholecystokinin (CCK), which is produced by enteric mucosal glands when fat enters, to release bile. gall is secreted from the...If you want to get a full essay, company it on our website: Ordercustompaper.com

If you want to get a full essay, wisit our page: write my paper