the heart

• It is divided into four chambers: two atria and two ventricles.
• The left ventricle pumps oxygen-rich blood to the body through arteries, while the right ventricle pumps deoxygenated blood to the lungs through pulmonary veins.
• The right atrium receives deoxygenated blood from the vena cava.
• Blood transported by the heart carries oxygen and nutrients to cells and removes waste products.
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