Answer:
The nervous system does depend on the circulatory and digestive system because it would not be able to work without a beating heart or if the person does not have any food, basically they would not be alive. However, the circulatory and digestive system need the nervous system to work. For example, the nervous system sends signals to the brain when there is pain in the stomach, meaning that you are hungry. It also tells the brain that you are full. For the circulatory system, the whole circulatory system is made up of all the electrical impulses that are part of the nervous system. They help your heart to beat and pump blood to your entire body.
Explanation:
Answer:
Doubling over, pale complexion, tears, furrowed brows
Explanation:
<u>Doubling over</u> is a reaction to clench the stomach when someone is in pain. <u>Pale complexion</u> is a result of blood loss, fear, anxiety, dehydration/light headedness, and loss or red blood cells. <u>Tears</u> (depending on the context) are a way to let out emotion - both sad and happy. <u>Furrowed brows</u> is usually a sign of discomfort which is usually a consequence of worrying too much or crying too much, both of which require face muscles to tense for a long(ish) period of time.
Answer:
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Because the more someone exerts themselves the more oxygen and carbon dioxide out put ratio is greater. The more you run and the faster you run the more oxygen you loose which is supplied to your muscles including your lungs.
