The paper presents some important aspects related to the human liver, which is a real human body's plant, having essential roles in human life, especially in the preparation of the food necessary for the organism, in the production of the various essential substances necessary for the body and the basic chemical elements. At the same time, the human liver has the role of detoxifying the body, processing and eliminating toxic elements from ingested foods. The liver secretes various substances necessary for the human body. The more we keep this vital organ healthier, the more human body becomes free, healthier, younger and vigorous. The liver is probably the organ with the most diverse functions in the human body. After ingestion of food, they are processed along the digestive tract and degraded to nutrients that will reach all tissues and organs in the body. The liver is an annexe of the digestive tract with a very complex structure. The morphological unit of the liver is the liver lobe. It has a pyramid shape and a length of a few millimeters. The liver contains up to 100,000 lobules.