Chronic lead poisoning

Lead is toxic to all tissues of the human body. The poisoning path can be inhaled by the respiratory tract by vapor or dust, and then phagocytic cells in the respiratory tract can quickly bring it to the blood; Poisoned people generally have a history of exposure to lead and lead compounds. Systemic diseases with nervous, digestive, and hematopoietic system disorders. Lead is absorbed in the ionic state and enters the blood circulation. It is mainly distributed in various tissues of the body mainly in the form of lead salts and plasma proteins. About 95% of lead is deposited in the skeletal system and hair in a few weeks. About 95% of the lead in the blood is distributed in red blood cells, mainly in the red blood cell membrane, and plasma only accounts for 5%. Lead phosphate deposited in bone tissue is stable and maintains a dynamic balance with lead in blood and soft tissues. The absorbed lead is mainly excreted through the kidneys, and can also be excreted through feces, breast milk, bile, menstruation, sweat glands, saliva, hair, nails, etc.