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Blood low in oxygen enters the right atrium of the heart through the superior and inferior vena cava.
ARTERIES ALWAYS take blood AWAY from the heart.
Arteries carry blood high in oxygen away from the heart to the rest of the body. The blood in arteries is oxygenated, while veins carry blood low in oxygen back to the heart.
The pulmonary vein carries blood with the highest oxygen concentration, as it transports oxygen-rich blood from the lungs to the heart. This freshly oxygenated blood is then pumped out to the rest of the body by the heart.
Coronary arteries carry oxygen-rich blood to the heart muscle. These vessels originate from the aorta and provide the heart muscles with the necessary oxygen and nutrients for proper functioning.
The lungs, I the alviolies.
maybe your question goes this way..."how does oxygen enter the blood from the lungs?"Two types of blood vessels carry blood throughout our bodies: The arteries carry oxygenated blood (blood that has received oxygen from the lungs) from the heart to the rest of the body. The blood then travels through the veins back to the heart and lungs, where it receives more oxygen.
Superior Vena Cava: All blood on the right side of the heart is CO2: Carbon Dioxide. It's O2 (Oxygen) starved.
Blood low in oxygen enters the right atrium of the heart through the superior and inferior vena cava.
The oxygen in each breath is circuited to the lungs where the alveoli absorb the oxygen and passed to the blood cells. The blood cells enter the heart where the oxygenated blood is circulated where needed.
The oxygen in each breath is circuited to the lungs where the alveoli absorb the oxygen and passed to the blood cells. The blood cells enter the heart where the oxygenated blood is circulated where needed.
The blood from the different parts of the body enters the heart through veins in order to be pumped/circulated. First through the lungs to be oxygenated and then back to the body where it can deliver the oxygen. Starting at the heart, freshly oxygenated blood is pumped to the body where the oxygen is used up by muscles etc., and the deoxygenated blood then returns to the heart. It is then pumped to the lungs where it absorbs oxygen from the air you breathe, and finally it is pumped back to the heart and the cycle begins over again.
Right Atrium.
The blood with high oxygen content enter the heart in left atrium through right and left pulmonary veins, combined together.
It originates there. First you breathe in and you add oxygen to you blood streams, by the way of capillaries. It then circulates from the heart to every where else.
It enters the arteries.
At the right atrium.