The circulatory system moves blood to the lungs. This part of the system is called the pulmonary circulation.
heart
The respiratory system draws oxygen into the lungs. The circulatory system moves blood into the lungs to pick up the oxygen and then brings the oxygen to cells in the rest of the body.
oxygenated blood
Blood is de-oxygenated when it it pumped into the lungs, and after going through the lungs, is now oxygenated.
The pulmonary circulation system is responsible for moving blood from the heart to the lungs for oxygenation and then back to the heart to be pumped to the rest of the body. The pulmonary arteries carry deoxygenated blood from the heart to the lungs, where it picks up oxygen, and the pulmonary veins return oxygenated blood back to the heart.
The questions leads towards which physiological important gases the blood contains.When the blood moves TO the lungs it has both CO2 (carbondioxide) and O2 (oxygen). However the level of oxygen is lower, and the level of CO2 is higher than with blood coming from the lungs.
respiratory system
As blood moves through the lungs, oxygen is exchanged for carbon dioxide. Oxygen diffuses from the air in the lungs into the blood, increasing the oxygen level in the blood. Conversely, carbon dioxide diffuses from the blood into the air in the lungs, decreasing the carbon dioxide level in the blood.
The blood leaving the lungs is loaded with oxygen, while blood entering the lungs is about to get oxygen from the respiratory system.
The left atrium receives blood from the lungs. This blood moves into the left ventricle to be sent out to the body.
The lungs hold air that is breathed in. Oxygen gas in the air moves into the blood. The heart pumps to transports this oxygenated blood to cells in the body that need it to produce energy.
Blood moves to the right ventricle where it is pumped to the lungs.