Final answer:
The cardiovascular system regulates a games player's body temperature during sport by increasing blood flow to the skin and distributing oxygen to the working muscles.
Step-by-step explanation:
The cardiovascular system needs to regulate a games player's body temperature when they play sport because physical activity generates heat through muscular contractions. When the body temperature rises, the cardiovascular system responds by increasing blood flow to the skin. This allows heat to be transferred from the body's core to the surface of the skin, where it can be dissipated through sweat and evaporation.
Additionally, the cardiovascular system helps to distribute oxygen to the working muscles during exercise. Oxygen is necessary for muscle contractions and energy production. By regulating body temperature, the cardiovascular system ensures that the body's cells and tissues receive adequate oxygen during physical activity.
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