what are the various functions of proteins in the human body?
Other than water, proteins are the most abundant type of chemical in the human body. Proteins play many vital roles in the human body, including providing structure and strength to cells and tissues, controlling biochemical reactions and aiding the immune system. Metabolism is regulated by proteins, as are hormones and the various activities they control.
Regulations of body processes: Body proteins have highly specialized functions in the regulation of body processes. For example, hemoglobin, an iron bearing protein that is the chief constituent of red blood cells performs a vital role in carrying oxygen to the tissues.