Three elements of life breathe heart and heart blood
Einstein said at his deathbed, "death is a blessing, without the death of an individual, there is no reproduction of the species." But as a doctor, death is often a kind of helplessness that patients need to face. In fact, we can scientifically understand death and face life correctly.
human survival depends on the normal functioning of the living system.
respiratory system, gas exchange to ensure adequate oxygen supply. The respiratory center and lung are important components of the respiratory system. The respiratory center is the command, the medulla of the brain, and the lung is a gas exchange station, which is responsible for the inhalation of oxygen and the exhalation of carbon dioxide.
two is the heart, playing the role of "pump", the normal beating of the heart ensures the smooth operation of blood circulation, the body has sufficient blood supply, and the oxygen is transported to the whole body.
three is a good enough blood - the normal blood volume and quality, ensuring that the whole body and organs can be fully irrigated, feed to the cells, and carry away the wastes produced by metabolism.
in addition, the digestive system determines whether the food can be digested and absorbed properly to ensure the energy supply; the urinary system produces urine and excretory metabolites to achieve the stable environment in the body; the nervous system includes the brain, spinal cord, peripheral nerves and muscles to make the body complete various physiological functions.
with the increase of age, the functions of all organs of the whole body gradually diminish and exhaustion, and finally stop work and make life terminate naturally. This is "natural death". Any disease or trauma, if the respiratory center stops working, the lung stops gas exchange, the heart beat irregularities or stops beating, the blood volume and the quality decline, is not enough to maintain life, it can also cause death.
myocardial infarction, for example, usually leads to cardiogenic shock, heart failure and arrhythmia.
drug allergy, such as penicillin, streptomycin, etc., may cause anaphylactic shock or laryngeal edema, resulting in asphyxia leading to death.
severe infections, such as SARS in 2003, were caused by respiratory failure and septic shock, leading to death.
severe digestive system, such as acute pancreatitis, gastrointestinal bleeding, hepatic coma, etc., is caused by shock and organ failure.
tumor induced death is due to the wild growth of the tumor cells, which has taken the nutritional supply of the body, and the death of all organs failure; when the tumor is transferred to the important organs, such as the brain, the sudden rupture of the brain blood vessels, the pressure of the respiratory center, and the death.
death caused by a car accident, one is a serious injury to the brain that stops the respiratory center from working; two is a severe fracture that leads to excessive blood loss, hypotension or shock, damage to the brain, and death.
gas and cyanide poisoning is caused by blocking the breathing of cells; drug poisoning in mice can cause multiple organ failure and extensive viscera bleeding; it causes severe fractures, craniocerebral trauma, hemorrhagic shock and so on, causing death; hanging, is because asphyxia leads to a sudden cardiac ischemia and hypoxia, leading to a sudden heart attack. Stop, cause death.