Food then reaches the stomach through the pharynx and esophagus. The stomach is the sac that stores and digests food macromolecules into a solution called chyme. Glands lining the stomach secrete hydrochloric acid that dissolves food particles and protein-digesting enzymes, called pepsin.Final stages of digestion and most of the nutrient absorption occurs in next portion of the tract: the small intestine.rom its exocrine portion it secretes (1) digestive enzymes and (2) a fluid rich in HCO 3- ions to neutralize the acid from stomach. The liver secretes bile. Bile contains HCO 3- ions and bile salts to solubilize fats. Bile reaches the gall bladder through hepatic ducts and is stored in the gall bladder between meals.
Slide show: How genetic disorders are inherited. Previous Next 1 of 6 Your genes, chromosomes and DNA Your body is made up of trillions of cells. Each cell has a core structure (nucleus) that contains your chromosomes. Each chromosome is made up of tightly coiled strands of deoxyribonucleic acid (DNA).hese changes in your DNA can result in genetic disorders. Your body is made up of trillions of cells. Each cell has a core structure (nucleus) that contains your chromosomes. Each chromosome is made up of tightly coiled strands of deoxyribonucleic acid (DNA).
1 A genetic disorder is an illness caused by changes in a personâs DNA.  These mutations can be due to an error in DNA replication or due to environmental factors, such as cigarette smoke and exposure to radiation, which cause changes in the DNA sequence.