NUTRITION
NUTRITION AND PHYSICAL ACTIVITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The arm muscles
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The leg muscles
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The heart
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Mr. Hendricks’s elbows
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Detailed explanation-1: -The hardest working muscle is the heart. It pumps out 2 ounces (71 grams) of blood at every heartbeat. Daily the heart pumps at least 2, 500 gallons (9, 450 liters) of blood. The heart has the ability to beat over 3 billion times in a person’s life.
Detailed explanation-2: -Your heart is absolutely essential for your body’s overall health and function. Without the pumping action of your heart, blood would be unable to move through your circulatory system. The other organs and tissues of your body wouldn’t be able to function properly.
Detailed explanation-3: -Cardiac muscle (or myocardium) makes up the thick middle layer of the heart. It is one of three types of muscle in the body, along with skeletal and smooth muscle. The myocardium is surrounded by a thin outer layer called the epicardium (AKA visceral pericardium) and an inner endocardium.