Answer:
The difference between these two systems is: Circulatory system is only made up of the blood, heart, blood vessels, lymph nodes
Respiratory System: Is only made up of the nose, pharynx, larynx, trachea, bronchi, bronchioles, alveoli(air sacs, where the gas exchange occurs)
Unlike the respiratory system, circulatory system is a network of blood.
Circulatory system pumps blood around the body and the Respiratory system is to take oxygen in and expel carbon dioxide.
Similarities: When deoxygenated blood enters the heart and it is then transported via pulmonary veins to be oxygenated by the lungs.
Both systems involve oxygen for the body to work.
I hope this was helpful!