Question

lucille is finding it difficult to play soccer after school. her doctor thinks that her cells might not be getting enough oxygen. when lucille talked about it with a friend, her friend said there might be a problem with lucilles respiratory system or circulatory system.
what do lucilles cells need in order for her body to function properly? how might a problem with lucilles respiratory system or circulatory system make it difficult for lucille to play soccer?

Explanation:

Lucille's cells need oxygen for cellular respiration, which produces energy (ATP) for the body to function. The respiratory system takes in oxygen and the circulatory system transports it to cells. If there's a problem with the respiratory system, less oxygen is taken in. If there's a problem with the circulatory system, less oxygen is delivered to cells. With less oxygen, cells produce less energy. Playing soccer requires a lot of energy. So, Lucille would find it difficult to play as her body can't get enough energy due to the lack of oxygen supply caused by the potential system problems.

Answer:

Lucille's cells need oxygen. A problem with the respiratory system could reduce oxygen intake, and a problem with the circulatory system could reduce oxygen delivery. Less oxygen means less energy (from cellular respiration) for the body. Since playing soccer is energy - demanding, Lucille struggles to play.