| A | B |
|---|
| Excretion | the process of removing wastes from the body |
| Urinary System | system that removes wastes from blood, controls blood volume, and balances salt concentrations |
| Urine | waste water (not reabsorbed by the body) |
| Kidneys | bean-shaped organs that filter blood and produce urine |
| Nephrons | special structures in the kidneys that filter blood |
| Ureters | tubes that carry urine from the kidneys to the bladder |
| Bladder | a "holding sac" for urine |
| Urethra | the opening where urine exits the body |
| Homeostasis | regulation of an organism's internal environment (critical for survival) |
| Dialysis | an artificial kidney machine used to filter blood |
| Skin | the largest organ in the body; its primary function is to protect |
| Epidermis | outer layer of skin made up of lots of dead skin cells |
| Dermis | layer of skin located below the epidermis; contains blood vessels, nerves, oil & sweat glands |
| Melanin | the pigment that gives skin its color |
| Sweat Glands | glands located in the dermis that produce sweat; help regulate body temperature |
| Fat Bodies | pockets of fat usually located around vital organs; protect & insulate |
