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| 2 | There are over one million of these in each of our kidneys. |   
| 4 | The kidneys play a vital role in maintaing the ________ balance in the body? |   
| 6 | A neprhon has two main parts: ______ and the renal tubule. |   
| 7 | Refers to something related to the kidneys. |   
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| 1 | The ________ muscle of urethra needs to relax for urination to occur. |   
| 3 | The major nitrogenous waste product the is excreted in the urine: |   
| 5 | The kidneys clean the ________ of the many waste products. |   
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