Sagot :
Answer:
This means we have two loops in our body in which blood circulates.Double circulatory systems are important because they ensure that we are giving our tissues and muscles blood full of oxygen, instead of a mixture of oxygenated and deoxygenated blood.
Answer:
Because they ensure that we are giving our tissues and muscles blood full of oxygen, instead of mixture of oxygenated and deoxygenated blood.