Answer:
respiratory and circulatory
Step-by-step explanation:
The respiratory and circulatory systems play an essential role in breathing and blood circulation for our body. That's because it allows the delivery of oxygenated blood to all tissues in the body.
Circulatory function is performed by the heart, and blood vessels. The blood vessels are spread throughout the body and carry the oxygen-rich blood (which was captured by the respiratory function) from the heart to all the tissues of our body and then return the oxygen-poor blood to the heart where more oxygen can be found.