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Write true or false 1. Excretory system helps us to eliminate waste from the body. 2. If wastes are not removed our body will be poisoned. 3. Our kidneys are approximately 20cm long. 4. If the kidneys will not function properly, we will not have a healthy life. 5. We must add eating salty foods to keep our kidneys healthy. 6. Our nervous system controls, regulates, and coordinates most of our body func 7. The brain performs different functions. 8. Another important organ of the nervous system is the spinal cord. 9. Neuron is found all over the body. 10. If our nervous system is damaged it is hard for us to live normally.​