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| | Renal system (from renal system) -- Encyclopædia Britannica (Site not responding. Last check: 2007-11-04) |
 | | in humans, organ system that includes the kidneys, where urine is produced, and the ureters, bladder, and urethra for the passage, storage, and voiding of urine. |
 | | The major parts of the system are the lymph nodes, tonsils, thymus, spleen, and lymphatic vessels; additional lymphatic tissue is found in isolated patches in the gastrointestinal tract, lungs, and bone marrow. |
 | | The endocrine system is a complex system of glands that secrete hormones throughout the body. |
| www.britannica.com /eb/article?tocId=58649 (901 words) |
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