| A | B |
|---|
| Excretion | The removal of metabolic wastes from an organism |
| Lungs | Rid the body of CO2 and excess H2O from the blood during exhalation (breathing out) |
| Liver | Largest internal organ |
| Liver | Major function is the removal of toxins (poisons) from the blood |
| Liver | Produces bile, which is used for the breakdown of fats (emulsification) in the small intestine |
| Detoxification | Is the removal of toxins (poisons) from the blood |
| Skin | Largest external organ of the body |
| Epidermis | Outer layer of the skin used for protection |
| Dermis | Lower layer of the skin where sweat glands are found |
| Sweat Glands | Consist of tiny-coiled tubes that open to the surface of the skin through pores |
| Urea | Is formed in the liver from the breakdown of amino acids in a process known as deamination |
| Urinary System | A group of organs whose sole purpose is to perform excretion |
| Kidneys | Bean-shaped organs located below and toward the back of the diaphragm |
| Kidneys | Remove wastes from blood and controls the concentration of various substances in the body |
| Nephrons | The functional units of the kidneys are known as |
| Nephrons | Each kidney contains approximately 1.25 million of these |
| Glomerulus | The renal artery subdivides into smaller arterioles and then subdivides into a ball of capillaries known as the |
| Bowman’s capsule | Through diffusion (passive transport), wastes are filtered out (urea, water, and salt) of the glomerulus and enter the |
| Urine | Is composed of urea, water, and salt |
| Ureter | Structure that carries urine from the kidneys and into the urinary bladder |
| Urinary Bladder | Temporarily store urine |
| Urethra | Urine is excreted from the bladder, through the urethra and out of the body |
| Kidney Stones | Are hardened crystal clumps associated with the kidneys |
| Gout | Produces symptoms similar to arthritis and is caused by deposits of uric acid in the joints |
