| A | B |
|---|
| alveoli | in the lungs, clusters of tiny, think-walled air sac at the end of each bronchiole, where oxygen and carbon dioxide are exchanged |
| asthma | a respiratory disorder in whch the bronchial tubes contract rapidly, resulting in shortness of breath or coughing; caused by smoking, allergy, or stress |
| bladdder | a bag-shaped, elastic, muscular organ that stores urine until it leaves the body; can hold up to 500 mL of urine |
| bronchi | two short tubes that branch off the trachea and carry air into the lungs |
| chronic bronchitis | a respiratory disease in which too much mucus is produced in the bronchial tubes |
| diaphragm | a muscle beneath the lungs tht helps move air in and out of the body |
| emphysema | a respiratory disease in which the alveoli in the lungs lose their ability to expand and contract (elasticity), mostly caused by smoking |
| kidney | the major organ of the urinary system; filters blood to produce the waste liquid called urine |
| larynx | airway to which the vocal cords are attached; the structure between the pharynx and the trachea |
| nephron | the tiny filtering unit of the kidney |
| passive smoking | the breating in of cigarette smoke-filled air by nonsmokers |
| pharynx | a tubelike passageway for both food and air, located between the nasal cavity and the esophagus |
| trachea | a cartilage-reinforced tuba that carries air to the bronchi |
| ureter | tube that leads from each kidney to the bladder |
| urethra | a tube that carries urine from the bladder to the outside of the body |
| urinary system | a system of excretory organs that rids blood of wastes, excess water, and excess salts |
| urine | waste liquid collected by the kidneys; contains water, salts, and other wastes |
