Did You Know!

While all human cells contain the same set of genetic instructions (DNA), they vary greatly in size, shape, and function. From the neurons in the brain to the muscle cells in the heart, each type of cell is specialized to perform specific tasks essential for the proper functioning of the body. This specialization, known as cellular differentiation, allows multicellular organisms like humans to have complex structures and perform diverse functions. For example, red blood cells are specialized for oxygen transport, with a unique biconcave shape that increases surface area for gas exchange, while skin cells are specialized for protection and barrier function, forming a tough outer layer to shield the body from external threats.