What are the primary building blocks of the body?

The primary building blocks of the body are proteins. Proteins are essential macromolecules made up of amino acids, which serve as the fundamental components necessary for the growth, repair, and maintenance of tissues in the body. They play a pivotal role in various physiological functions, including the formation of enzymes, hormones, and antibodies, which are crucial for metabolic processes and immune response.

Additionally, proteins are vital for muscle development and overall structural integrity. Unlike carbohydrates, fats, and vitamins, which serve different roles—such as energy storage, insulation, and various metabolic functions—proteins are primarily identified as the main structural units that make up a significant proportion of the cellular machinery and contribute directly to the body's physical structure and function.