<span>A letter to request a certified birth certificate
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It is not a or b, because it helps kids of all skill levels. Because of this, your answer should be C, because Piaget believed that teaching should be done through actually teaching students different concepts, instead of making them just know the answers. That is what cooperative learning helps do.
        
                    
             
        
        
        
Answer:
Explanation:
The Circulatory system pumps blood around the body, and the respiratory system facilitates the gas exchange that keeps the blood fresh. The heart is connected to the lungs via the pulmonary arteries and veins.
The circulatory and respiratory systems work together to deliver oxygen and other important nutrients to every cell in our bodies. All of our body cell require oxygen to conduct cellular respiration. In this process, oxygen burns the nutrients from foods w eat, providing energy for the cells. The respiratory system is responsible for bringing oxygen into the body and removing waste gasses.
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<span>Since I do not know your maximum heartrate ill give you the standard. For vigorous-intensity physical activity, a person's target heart rate should be 70 to 85% of his or her maximum heart rate.</span>