Human cells

Human cells are the fundamental building blocks of the body, each acting as a tiny, specialized unit that carries out vital functions. They are enclosed by a membrane, contain DNA—the instructions for life—and have various structures called organelles that perform tasks like energy production, protein synthesis, and waste removal. The body has trillions of these cells, which work together to form tissues and organs, enabling us to breathe, think, move, and stay healthy. Despite their small size, human cells are incredibly complex and precisely coordinated to sustain life.