Heart
What is the heart? the heart, one of the most vital organs of the human body, is a muscular organ with a circulatory system, which is responsible for pumping life-sustaining blood through the blood vessels spread throughout the body, by repeated, rhythmic contractions. from the moment it begins beating, until the moment it stops, the human heart works tirelessly. where in the human body is the heart located? in the human body, the heart is located a little to the left of the middle of the chest, behind the breastbone, and is well protected by the rib cage. it is placed anterior to the vertebral column and posterior to the sternum or breastbone. what is the how many parts does a human heart have? human heart? a normal human heart is about the size of a clenched fist and it weighs approximately 250 to 300 grams in females and 300 to 350 grams in male. right from birth, as the body develops, the heart grows at the same rate as the fist. what is the internal structure of the heart? th...