The respiratory system inhales oxygen and then is passed onto the cardiovascular system, by entering the red blood cells, which are pumped by the heart around the body to all the cells and organs. After that the red blood cells carry back the de-oxygenated blood, which is the carbon dioxide back to the heart, which then lets it to enter the lung, through the artery, into the lung. This is then exhaled out of the body by the lung, which means that the respiratory system inhales, cardiovascular supplies the oxygen around the body, and then respiratory exhales carbon dioxide out of the body.

The respiratory system is basically the anatomy of the breathing apparatus, the circulatory system is blood vessels and the heart and things like that. The tissues and cells within the body need oxygen to function and de-oxygenated blood pumped out of the heart travels to the lungs to get oxygenated, travelling back into the heart to be pumped throughout the body delivering oxygen to tissues, cells and major organs throughout the whole body. The blood in the circulatory system supplies oxygen from the respiratory system to the bondy to enable life and correct function.

How Are The Circulatory System And Respiratory System Interrelated?

When blood moves  from pulmonary artery  to the lungs where the impure blood is purified  due to the gaseous exchange . In this way when gaseous exchange takes place because of the respiration .so,in this way we can tell that they both are interrelated.

Oxygen enters from the mouth and nasal, going through the esogushas and into the aveoli, blood is pumped through out the body and it contains oxygen

They help put oxygen in blood then pump blood

I think the cells carry blood