| A | B |
|---|
| digestion | the mechanical and chemical breakdown of foods for use by the body's cells |
| absorption | the passage of digested food from the digestive tract into the cardiovascular system |
| elimination | the expulsion of undigested food or body wastes |
| mastication | the process of chewing |
| peristalsis | a series of involuntary muscle contractions that move food through the digestive tract |
| gastric juices | secretions from the stomach lining that contain hydrochloric acid and pepsin, an enzyme that digests protein |
| chyme | a creamy, fluid mixture of food and gastric juices |
| bile | a yellow-green, bitter fluid important in the breakdown and absorption of fats |
| indigestion | a feeling of discomfort in the upper abdomen |
| heartburn | a burning sensation in the center of the chest that may rise from the bottom, or tip, of the breastbone up to the throat |
| hiatal hernia | a condition in which part of the stomach pushes through an opening in the diaphragm |
| appendicitis | inflammation of the appendix |
| peptic ulcer | a sore in the lining of the digestive tract |
| urine | liquid waste material |
| nephrons | the functional units of the kidneys |
| ureters | tubes that connect the kidneys to the bladder |
| bladder | a hollow muscular organ that acts as a reservoir for urine |
| urethra | the tube that leads from the bladder to the outside of the body |
| cystitis | an inflammation of the urinary bladder |
| urethritis | the inflammation of the urethra |
| hemodialysis | a technique in which an artificial kidney machine removes waste products from the blood |
