| A | B |
|---|
| proteins | Nutrient that is made up of amino acids |
| calorie | A unit to measure energy |
| villi | Structures in the small intestine that absorb large amounts of nutrients |
| two liters | Amount of water the human body normally needs in a day |
| large intestine | Water is absorbed and wastes are eliminated |
| saliva | Contains an enzyme that begins chemical digestion |
| peristalsis | A process that involves muscle contractions that move food through the esophoagus |
| small intestine | Where most of the nutrients are absorbed |
| small intestine | Where most chemical digestion takes place |
| bile | A substance produced in the liver for breaking down fats |
| water | Needed for all body processes to take place |
| urinary bladder | Stores urine |
| excretory system | Collects and removes wastes from the body |
| epiglottis | The small flap that seals off the trachea during swallowing |
| nephrons | Tiny filtering structures where urine is produced in the kidneys |
| kidneys | Elininates urea and excess water from the blood |
| skin | Eliminates water and chemical wastes in perspiration |
