The human heart beats an estimated 2.0-2.5 billion times in a lifetime. Unlike the brain, which requires a constant feed of glucose to satisfy its energy needs, the heart is relatively plastic in its energy use, burning glucose, other carbs or even fats to meet its constant thirst for energy. Explain why this is important in the scheme of life. Why is the Mediterranean diet considered better for supplying needed nutrients to the heart and noted to reduce heart disease?

The human heartbeats.

The heart is a four-chambered pump that contracts about one lakh times and each day the pumping is equivalent to about 2000 gallons of blood from the body. Thus the heartbeat about 2.5 billion times in seventy years of life.

Thus the answer is Mediterranean diet is known to have needed nutrients that can percent heart diseases.

Learn more about the heartbeats.

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read the excerpt from "the tell-tale heart.”

object there was none. passion there was none. i loved the old man. he had never wronged me. he had never given me insult. for his gold i had no desire. i think it was his eye! yes, it was this! he had the eye of a vulture—a pale blue eye, with a film over it. whenever it fell upon me, my blood ran cold; and so by degrees—very gradually—i made up my mind to take the life of the old man, and thus rid myself of the eye forever.  

read the excerpt from "the black cat.”

beneath the pressure of torments such as these, the feeble remnant of the good within me succumbed. evil thoughts became my sole intimates—the darkest and most evil of thoughts. the moodiness of my usual temper increased to hatred of all things and of all mankind; while, from the sudden, frequent, and ungovernable outbursts of a fury to which i now blindly abandoned myself, my uncomplaining wife, alas! was the most usual and the most patient of sufferers.

by revealing the narrator’s deepest thoughts, the author