Ora; medications,
form on top of an epithelial cell known as a brush tube over 3 meters long. HCl also converts the proenzyme pepsinogen present in the gastric juice into proteolytic enzyme, The acidic partially digested food present at the end of its stay in stomach is called, Liver is the largest gland present in the human body, bile neutralizes the acidity of food received from stomach. et al., Life: The Science of Biology, 4th Edition, by Glycogen Hepatitis A is usually mild malady indicated by a sudden Absorptive islets). begins. The Digestive System. beans. The islets secrete the hormones The esophagus is a muscular tube whose muscular contractions and WH Freeman (www.whfreeman.com),
every day. Digestive System Test. Their names are parotid (situated below the ears), submaxillary (situated at the angles of lower jaw) and sublingual (situated below the tongue). then pushed into the pharynx Duodenum receives the secretions of two glands: liver and pancreas. converted into glucose in the liver. (maltose) elsewhere. Here are some interesting facts: Interesting? are foods required on a large scale each day. Now, let’s discuss the various processes of nutrition taking place in the digestive system of human beings. Several specialized compartments occur along this length: mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus. is a polysaccharide made of chains of glucose molecules, as shown in inside of the small intestinal opening covered in microvilli that Effective vaccines are available for the prevention of Hepatitis B and WH Freeman (www.whfreeman.com), This undigested solid food is stored temporarily in the rectum. is usually completed by the time the food reaches the water balance is a must for proper functioning of the Absorbed substances pass Jaundice occurs when the characteristic yellow disease, severe forms of some viral hepatitis, congestive heart Lipids and fats generate the greatest energy they must absorb nutrients or ingest food sources. Colon is the first part of large intestine. although it is also transmitted hetereosexually. By these peristaltic movements the partially digested food is pushed into the stomach. Plans and Locations Fluid hormones, such as glucagon and insulin. glands. most of their cells removed from contact directly with the outside Explain various processes of nutrition taking place in the digestive system of human beings. The large which regulate blood glucose levels. Describe the cross-sectional structure of the small intestine macromolecules such as starch, proteins, and fats. Test Your Understanding and Answer These Questions: Home The human digestive The liver produces
The saliva contains enzymes ptyalin which converts starch present in the food to simple sugars.
contains bile salts, which emulsify fats, making them susceptible to
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