3. What would happen diaphragm did not pull the lungs down?
12
4. What would happen if our kidneys stopped working ?
2 mark
5. Why do you think the breathing rate increases after exercise?
6. Explain how the circulatory and respiratory systems are connected
(3 marks)
Answers
Answer:
1. The diaphragm contacts to make space for our lungs to breathe, and relaxes to help us exhale. if the diaphragm stopped working we will not be able to breathe, or have a really hard time doing so.
2. The kidney's job is to cleans the blood and transforms waste into urine, therefore is they stop working toxic substances will accumulate in your body in addition to excess water in your body. (Life with only one kidney is still possible)
3. when you exercise your body consumes more energy and resources therefore needing more oxygen, and needing more oxygen means that you should breathe more often to transport as much blood to your body.
4.When you breathe the air goes to the lungs which is part of your respiratory system. through diffusion the oxygen particles and CO2 particles exchange places and oxygen is transferred to your blood, which is part of your circulatory system
Hope I helped
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