Final answer:
The heart muscle extracts oxygen and nutrients from the blood via the coronary circulation.The correct answer is option 3) via the coronary circulation
Step-by-step explanation:
The heart muscle extracts oxygen (O2) and nutrients from the blood via the coronary circulation, option 3. The coronary circulation consists of blood vessels that carry blood to and from the heart muscle cells. There are two coronary arteries that supply the two sides of the heart with oxygenated blood. Cardiac veins drain deoxygenated blood back into the heart.
When the heart pumps, it receives oxygenated blood from the left atrium and pumps it out to the body through the aorta. This oxygen-rich blood is then distributed to the smaller arteries and finally reaches the capillaries, where the exchange of oxygen and nutrients with body tissues occurs.
The heart's own blood supply comes from the coronary arteries, which branch off the aorta. These arteries wrap around the heart, providing oxygen and nutrients to the heart muscle cells. The deoxygenated blood from the heart muscle is drained by the cardiac veins and returns to the heart via the coronary sinus.