Humans have a set of 24 ribs, 12 on each side, which surrounds the chest and enables breathing. Ribs protect the heart and the lungs. The lungs inflate during breathing and the ribs move to accommodate the inflated lungs. This movement happens about five million times a year, corresponding to the number of times we breathe …
Human beings have over 600 separate muscles in the body. Tendons connect bones to the muscles. There are three types of muscles, skeletal, smooth and cardiac. Muscles enable movement. We use 43 muscles to frown, 17 muscles to smile, and 54 muscles every time we step forward.
Every minute 750 ml of blood gets pumped through your brain, which is merely 15–20 per cent of blood flow from the heart. An adult brain requires about 20 per cent of the body’s oxygen. To meet this requirement and other metabolic needs of the neurons, approximately 20 per cent of the blood flow is directed …
