| A | B |
| trachea | airway to lungs |
| alveoli | air sacs of the lungs |
| diaphram | main respiratory muscle |
| epiglottis | flap of cartilage that stops food from entering the trachea |
| bronchi | 2 main branches splitting off from the trachea and going to the lungs |
| pharnyx | Upper part of the airway |
| vocal chords | produces sound |
| cilia | fine hairs in nose that traps dust |
| sinuses | air spaces in the skull that make it lighter |
| esophagus | Tube leading to the stomach (not to the airways) |
| alveoli | gas exchange happens here (O2 and CO2) |
| lymph | clear liquid (interstitial fluid) that flows through lymph vessels |
| lymph nodes | masses of tissue of the immune system that filter and trap foreign particles |
| spleen | Organ that filters foreign substances and produces white blood cells |
| virus | infectious agent that can only replicate in a living host |
| inflammatory response | tthe body's response to a foreign invader |
| pus | collection of dead cells, dead bacteria, dead wite blood cells. |
| antigen | any substance that your body produces antibodies for |
| antibody | a Y shaped protein produced by the body to fight antigens ("invaders") |
| neutrophil | most common type of white blood cell |