| A | B |
|---|
| Respiratory System | gets O2 into body, removes CO2 and wastes |
| lungs | supply body with O2 gas |
| nose | warms, moistens, and filters air coming into the respiratory system |
| epiglottis | directs air down the respiratory path and food and water down the digestive path |
| trachea | tube that provides a passageway for air |
| larynx | structure that enables you to speak |
| vocal cord | vibrates to produce sound |
| bronchus | tube that carries air into lungs |
| alveolus | O2 and CO2 are exchanged with blood and air |
| diaphragm | muscle below rib cage that contracts and relaxes to make room for expanding lungs |
| excretory system | removes wastes from the body |
| kidneys | body's filter system for waste and poisons |
| nephrons | found in kidneys, chemical filters |
| ureters | narrow tube that carries urine to bladder |
| bladder | stores urine until it is expelled from body |
| urethra | tube that expells urine out of body |
| urea | waste formed in liver, goes to kidneys through blood stream |
| liver | helps to remove waste by filtering blood |
| skin | helps body get rid of excess salt, urea, and water (called sweat) |
| sweat glands | coiled tubes in skin that connect to pores to help remove sweat |
| dermis | bottom layer of skin, contains nerves and blood vessels |
| epidermis | top layer of skin contains mostly dead flat cells |
