肝脏是人体最大的消化腺，也是体内新陈代谢的中心。据估计，在肝脏中发生的化学反应有500种以上。具体说起来，肝脏主要从事5种“工作”：
The liver is the largest digestive gland in the human body and the center of metabolism. It is estimated that there are more than 500 chemical reactions that take place in the liver. Specifically, the liver is primarily responsible for five "functions":
合成功能（Synthetic Function）
五谷杂粮进入消化道，经过消化，水解为葡萄糖，才能运送至肝脏，然后被人体吸收利用。葡萄糖被运送至肝脏后，其中一部分在肝脏内贮存为糖原，以备日后利用。由消化道吸收的氨基酸也在肝脏内进行蛋白质合成、脱氨、转氨等作用。肝脏还是多种凝血因子的主要合成场所，人体内12种凝血因子，其中4种是在肝内合成的。
Grains enter the digestive tract and are digested and hydrolyzed into glucose before being transported to the liver for absorption and utilization by the body. After glucose is transported to the liver, some of it is stored as glycogen for future use. Amino acids absorbed by the digestive tract also undergo protein synthesis, deamination, and transamination in the liver. The liver is also the main site of synthesis for various coagulation factors, with four of the twelve coagulation factors in the human body being synthesized in the liver.
分解功能（Decomposition Function）
肝脏是人体的主要解毒器官，它可保护机体免受损害。体内的某些代谢废物或肠道细菌的腐败产物以及服用的药物等，经过肝脏处理，有毒物质变成无毒、毒性较小或易于溶解的物质被排出体外，这个过程称为解毒作用。
The liver is the main detoxifying organ of the human body, protecting the body from harm. Certain metabolic waste products, putrefactive products of intestinal bacteria, and medications taken are processed by the liver, where toxic substances are converted into non-toxic, less toxic, or easily soluble substances that are excreted from the body, a process known as detoxification.
滤过功能（Filtration Function）
激素合成于内分泌器官，以微量调节各种人体功能。大多数激素在肝内发生化学变化并排出。如甲状腺激素、雌激素、醛固酮和抗利尿激素都在肝内进行代谢。所以当肝病较重时会出现激素水平的失衡，影响机体的正常功能。
Hormones are synthesized in endocrine organs to regulate various bodily functions in trace amounts. Most hormones undergo chemical changes and are excreted in the liver. For example, thyroid hormone, estrogen, aldosterone, and antidiuretic hormone are all metabolized in the liver. Therefore, when liver disease is severe, there may be an imbalance in hormone levels, affecting the normal function of the body.
贮存功能（Storage Function）
肝脏可贮存脂溶性维生素，人体95%的维生素A都贮存在肝脏内。肝脏还是维生素C、D、E、K、B1、B6等的贮存和代谢场所。铁是组成血红蛋白的重要成分，肝脏中储藏的铁比体内全部血液中含有的铁还要多。
The liver stores fat-soluble vitamins, and 95% of the body's vitamin A is stored in the liver. The liver is also the storage and metabolic site for vitamins C, D, E, K, B1, B6, and others. Iron is an important component of hemoglobin, and the iron stored in the liver is more than the iron contained in all the blood in the body.
产生胆汁（Production of Bile）
胆汁是有助于吸收脂质和脂溶性维生素的消化液。肝脏会生产胆汁，然后将其运送至胆囊后蓄存下来，在胆囊内浓缩之后被排放到十二指肠当中。
Bile is a digestive fluid that helps in the absorption of lipids and fat-soluble vitamins. The liver produces bile, which is then transported to the gallbladder for storage. After concentration in the gallbladder, bile is released into the duodenum.
例解病析（Case Analysis）
患者信息：54岁，男性
诊 断：疑似肝癌，肿瘤标记物异常
治 疗 情 况：经过NK细胞免疫治疗后，肿瘤标记物转为正常
Patient Information: 54 years old, male
Diagnosis: Suspected liver cancer, abnormal tumor markers
Treatment: After NK cellular immunotherapy, tumor markers returned to normal
治疗前后对比：
治疗前：上腹部饱胀不适明显，进食量减少
治疗后：不适感消失，食量增加
Comparison Before and After Treatment:
Before treatment: Epigastric fullness and discomfort are obvious, and the amount of food eaten is reduced
After treatment: the discomfort disappears and the amount of food eats increases
经验分享：NK细胞免疫疗法可有效预防和治疗肿瘤。NK细胞是人体内抗癌活性最强的非特异性免疫细胞，可有效抑制癌细胞的转移复发。
Experience Sharing: NK cellular immunotherapy can effectively prevent and treat tumors. NK cells are the most potent non-specific immune cells in the human body with anticancer activity, effectively inhibiting the metastasis and recurrence of cancer cells.