Heartful

The heart beats 100,000 times a day and is responsible for pumping blood throughout the body and returning blood to the heart. Most people generally think that the heart’s job is to pump blood throughout the body. Even medical students think so at first. However, that function is half of the heart’s role.

　The heart weighs about 300 grams and is composed mainly of myocardial cells, or cells responsible for the contraction and relaxation of the heart, but there are also specialized myocardial cells that act as electrical wires to keep the heart moving electrically. If this wire is disconnected and broken, or if there is an extra electrical wire, the pulse slows down or speeds up again.

These specialized myocytes are collectively called the stimulus conduction system. This system works like a radio station on earth, transmitting and regulating spontaneous electrical signals at the sinus node and atrioventricular node, the stimulator electric system. They also produce electrical stimulation, but they also prevent extra signals from being transmitted. It also acts like a barrier. It senses and prevents the currency of electrical signals that are not needed by bad people. It’s really well done.

Thanks to this function, the heart transmits electrical signals day and night, stimulating myocardial cells and causing the heart to repeatedly contract and relax. Even when you are resting, this activity never stops. It is working hard. This is a heartwarming story. It is a heartwarming work. Heartful is a word that really expresses it well.