Answer: Oxygen-depleted blood from the body enters the right atrium through two veins, the superior vena cava and the inferior vena cava. The blood then passes to the right ventricle. The right ventricle pumps the deoxygenated blood to the lungs, through the pulmonary artery. After the blood loses carbon dioxide and picks up oxygen in the lungs, it flows through pulmonary veins to the left atrium. From the left atrium the newly oxygenated blood enters the left ventricle. The left ventricle is the main pumping chamber, sending blood through the aorta to all of the body except the lungs.
The lung takes carbon dioxide out of your blood and replaces it with oxygen.
To the rest of the body
Saliva
Blood.
Cappilaries
Oxygen exchange takes place in the capillaries, which are the smallest blood vessels in the body.
Arteries carry oxygen-poor blood from the heart; veins carry oxygen-poor blood back to the heart.
the heart has a four chamber system it takes in the blood with out oxygen, gives it oxygen and pumps it though out the body
Arteries carry oxygen-poor blood from the heart; veins carry oxygen-poor blood back to the heart.
Deoxygenated blood is not collected anywhere. Blood is a constantly moving stream - it never stops, as the question implies. The oxygen poor blood goes to the lungs, where it turns oxygenated as it takes up oxygen.
In the blood, hemoglobin loosely grabs oxygen for transport to the body cells. The red blood cells (erythrocytes) have the iron (from hemoglobin) that takes the oxygen for a ride.
Oxygen enters the blood in the alveoli of the lungs