This question is misguided. Both sides of the heart contain blood. The difference is that the right side contains deoxygenated blood, which is sent to the lungs to pick up more oxygen. The oxygenated blood returns to the left side of the heart to be sent off round the body to supply all the organs and tissues. The first person to state that blood goes to the lungs, where it is changed by the air and then goes back to the heart was Michael Servetus (born 1509), though the idea was independently discovered by Realdo Columbus around 1559.
The first scientist to describe that the heart circulates blood was the Arabian physician Ibn al-Nafis, in 1242 AD.
The left side of the heart contains oxygen-rich blood. The right side of the heart contains deoxygenated blood.
the right side of the heart contains deoxygenated blood.
The atria of the heart are separated from the ventricles by an area called coronary groove (sulcus). This contains the trunks of the coronary arteries which bring oxygenated blood to the heart muscles. On the back surface of the heart, the coronary sulcus contains the coronary sinus which receives venous blood from the heart muscles.
The circulatory system contains your heart your blood cells and your veins
The circultory system itself is an organ system. It contains the heart and blood vessels.
The right ventricle of the heart contains deoxygenated blood. It receives blood from the body and pumps it to the lungs for oxygenation.
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scientist explain he was but what they found of the body was a whole in his leg which caused him to have an infection called a blood clock that went up to his heart
left
oxygen rich blood
Venous blood travels from the body to the heart in veins and it goes to the right atrium.