The video tackles on the structure, the different parts, and the functions of the nephron. The nephron is the functional unit of the kidney, responsible for filtering and processing blood to form urine. It is also for the functions of filtration, reabsorption, and secretion that is vital to help regulate the balance of water, electrolytes, and other substances in the body, as well as eliminate waste products. This organ is essential, providing significant functions in the body. Hence, it is important to know the mechanism on how it works.