| A | B |
|---|
| respiration | energy releasing process that is fueled by oxygen |
| nose | organ that warms, moistens, and filters air entering the respiratory system |
| epiglottis | small flap of tissue that closes over the esophagus while breathing |
| trachea | also called the windpipe, this organ carries air from the nose to the lungs |
| bronchi | tube that branches off from the trachea and enters a lung |
| bronchioles | smaller tubes that branch off of the bronchi inside the lungs |
| lungs | main respiratory organ |
| alveoli | grape like clusters of round sacs in the lungs that exchange oxygen for carbon dioxide |
| diaphragm | dome shaped muscle that aids in breathing |
| thoracic cavity | region of the respiratory system known as the chest |
| excretion | process in which wastes are removed from the body |
| kidney | main excretory organ that filters the blood |
| nephron | microscopic chemical filtering factories found inside the kidneys |
| ureter | tube that carries urine from a kidney to the urinary bladder |
| urinary bladder | muscular sac that stores urine |
| urethra | tube through which urine leaves the body |
| epidermis | top layer of the skin |
| dermis | bottom layer of the skin |
