They are released into the lymphatic system.
Answer:
This is generally called evolution. Species adapt to their surroundings to survive. Sometimes parts are added to help them, other times things are taken away to help them. Features are added to their bodies and minds to help them survive. Over time their bodies change.
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Answer: In a period of time water has the power to dissolve salts. Too much salt and not enough water is not good for your body. For instance, take Kool Aid, if you pour to much of the mixture in a little bit of water it wont dissolve correctly.