human biology

Human biology is the study of how our bodies function, from the smallest cells to complex systems. Our cells form tissues, which build organs like the heart, lungs, and brain, each with specific jobs. These organs work together through systems—such as the circulatory, respiratory, and nervous systems—to keep us alive, healthy, and active. Our genetics, influenced by DNA, guide development and inherited traits. Human biology also explores how our bodies respond to environment, nutrition, and disease, helping us understand health, growth, aging, and how to maintain well-being throughout life.