| A | B |
|---|
| alveoli | small air sacs surrounded by capillaries, gas exchange betwen blood and lungs takes place here |
| bronchi | two branches or the trachea which lead to the lungs |
| larynx | voice box, contains vocal cords |
| lung | main organs of respiration |
| nose | helps warm and clean the air |
| pharynx | back of mouth, passageway for air and food |
| respiratory system | exchanges carbon dioxide and oxygen with the environment |
| trachea | windpipe, connects pharynx to lungs, lined with mucus and cilia |
| excretory system | removes metabolic wastes from the body |
| kidneys | organ that filters the blood |
| nephrons | removes wastes from blood and transfers it to the ureter |
| ureter | tube that connects the kidney to the bladder |
| urethra | tube where the urine exits the body |
| urinary bladder | store the urine (excess salts, water, urea) |
