| A | B |
|---|
| organ | two or more tissues that work together to do a specific job in the body |
| organ system | a group of organs that work together to do a specific job in the body |
| respiration | the process of taking in oxygen and getting rid of carbon dioxide |
| artery | a blood vessel that carries blood away from the heart |
| vein | a blood vessel that carries blood to the heart |
| nutrient | a substance that is obtained from food and is used by the body |
| digestion | the breaking down of food into forms that the body can use |
| saliva | a liquid in the mouth that moistens food and begins digestion |
| enzyme | a chemical that controls the speed of certain processes in the body |
| esophagus | the tube that carries food from the mouth to the stomach |
| small intestines | the organ of the digestive system where most digestion takes place |
| large intestines | the last organ of the digestive system that removes water and stores waste materials |
| indigestion | includes symptoms that occur when the body has difficulty digesting food |
| fiber | plant parts that the body can't digest. |
| excretory system | the organ system that removes wastes from the body cells |
| kidney | one of two organs in the lower back that filter cell wastes from the blood |
| urinary system | the body system that excretes urine |
| urine | a liquid formed in the kidneys made up of nitrogen wastes, some salts, and extra water |
| urinary bladder | a saclike organ that stores urine temporarily. |
| dialysis | the use of a machine to clean the blood |
| organ transplant | an operation that replaces a person's organ with an organ from another person |
| organ donor | a person who gives one or more organs to be used for transplants |
| respiratory system | carries out respiration |
| cardiovascular system | carries blood cells throughout the body |
| nervous system | controls all the activities your body does |
| digestive system | is in charge of digestion |
| How do I keep my digestive system healthy? | drink water, exercise regularly, chew food thoroughlly. |
| Name three causes of injuries to organs. | sports, car accidents, and electrocution |
| Name three ways to protect your organs against injury. | Wear seat belt correctly, wear padding and helmet for sports, and don't stick anything except a plug into an outlet. |
