hepatocyten

Hepatocytes are the primary functional cells of the liver. These highly specialized cells constitute the majority of the liver's mass, accounting for approximately 80% of its volume. Hepatocytes are polyhedral in shape and are arranged in interconnected cords or plates, forming the hepatic lobules. Their remarkable versatility allows them to perform a vast array of metabolic, endocrine, and exocrine functions essential for maintaining homeostasis.

One of the key roles of hepatocytes is in metabolism. They are central to carbohydrate metabolism, storing glucose as glycogen and releasing it when blood glucose levels are low. Hepatocytes also play a critical role in lipid metabolism, synthesizing cholesterol, lipoproteins, and bile acids, and are involved in fatty acid oxidation and ketone body production. Protein synthesis is another vital function, with hepatocytes producing most plasma proteins, including albumin, clotting factors, and transport proteins.

Beyond metabolism, hepatocytes are involved in detoxification. They metabolize and detoxify a wide range of endogenous and exogenous substances, including drugs, alcohol, and metabolic waste products like bilirubin. This process often involves the cytochrome P450 enzyme system. Furthermore, hepatocytes are responsible for bile production, which aids in the digestion and absorption of fats in the small intestine and the excretion of waste products. They also play a role in the storage of vitamins, such as vitamins A, D, E, K, and B12, and minerals like iron and copper. Hepatocytes are continuously regenerating, contributing to the liver's remarkable capacity for repair and regeneration.