Answer:
Urinary system and Circulatory systems work together: The urinary system cleans the blood in the circulatory system. Blood traveling back to the heart passes through the kidneys in the urinary system. The kidneys clean the blood and control the amount of salt, water, and other substances in the blood.
Explanation:
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A) the runner's muscles have accumulated lactic acid.
Pea plants had easily observable traits which consisted of 7. It was easier for him to manipulate them. And they grew fast.
<em>B. Mountains grow upward</em>
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