The best describes the relationship between the circulatory system and the respiratory system - A. The circulatory system is the transport system for the respiratory system.
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. The cardio-respiratory system works together to get oxygen to the working muscles and remove carbon dioxide from the body.
- Air moves in and out of the lungs through the trachea, bronchi, and bronchioles.
- Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
- It also helps to regulate the pH of the blood.
- Respiration is the series of events that result in the exchange of oxygen and carbon dioxide between the atmosphere and the body cells.
Thus, the correct choice would be - A. The circulatory system is the transport system for the respiratory system.
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