Answer: A scientific question can be answered through an investigation. What is tested? Scientists call this an independent variable.
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The circulatory system is used to transfer blood
Answer:
I don't know the answer to the first one, but I can answer the second question. <em>Cellular respiration </em><u><em>has carbon dioxide and water as waste products</em></u><em>.</em>
Explanation:
<em>Cellular respiration</em> does <u>not</u> form glucose & oxygen and doesn't occur in the chloroplast, but does form <em>ATP energy</em>, <em>carbon dioxide</em>, & <em>water</em> and the process occurs in <em>mitochondria</em>. Photosynthesis on the other hand forms glucose & oxygen and does occur in the chloroplast.
1. How many muscles are in the human body?
2.What diseases affect the muscular system?
3. What are the functions of the muscular system?
4.what are two types of muscle fibre?