- The liver plays a crucial role in maintaining various physiological functions essential for the body's metabolism and overall health.
- Among its many functions, the liver is responsible for the synthesis of plasma proteins, such as albumin and clotting factors, which are vital for maintaining blood volume and coagulation.

- Another key function is the detoxification of drugs and toxins. The liver metabolizes and neutralizes harmful substances, allowing them to be safely excreted from the body.
- Additionally, the liver serves as a storage site for glycogen, which is the stored form of glucose. This storage helps regulate blood sugar levels by releasing glucose when needed.
- However, production of red blood cells (erythropoiesis) is not a primary function of the liver in adults. While the liver can produce red blood cells during fetal development, after birth, this function is mainly taken over by the bone marrow.

Therefore, the correct answer is Production of red blood cells, as it is not a physiological role of the adult liver.

Reference: Robbins Basic Pathology, 10th Edition, Chapter 2: Introduction to Pathology/Cell Injury and Adaptations