Being the strongest muscle in the body, the hearts purpose is to pump blood through our blood vessels through rhythmic contractions. To regulate blood pressure and volume, the heart secrets “ANF”, which is a very powerful peptide hormone. It affects the regulatory region of the brain, as well as the kidneys, blood vessels, and the adrenal glands.
First off, i would like to clear up a worldwide rumor; the Heart is not located on the left side of your body! Its actual location is found in the center of your chest, just SLIGHTLY of to the left hand side, and underneath the sternum. For protection, the heart is enveloped in a sac called the pericardium, and is surrounded by the lungs. First thought is, “why does the strongest muscle in the body need so much protection?”. It’s fragile! Weighing in at about 300 grams, the heart consists of 4 chambers; 2 lower ventricles and 2 upper atria. Valves between the atrium and the ventricle control proper blood flow from one to the other.
The job of pumping blood everywhere in the body is a huge responsibilty. Each and every beat of the heart consists of a sequence of events called the cardiac...
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