Now, from one perspective, there's nothing too special about the zygote. The zygote is simply a single cell that contains a single nucleus. It contains organelles swimming around in the cytoplasm and it also contains the cell membrane that encloses all the organelles and the cytoplasm. But from another perspective, the zygote is a very, very special cell. And that's because following the formation of the zygote the zygote somehow knows to begin a set of very, very complicated and very intricate processes we call embryological development that allows the zygote to actually eventually develop into the highly specialized and highly complex tissues and organs and systems found within the human body. Such as, for example, the cardiovascular system that consists of the hearth and the blood vessels the nervous system that consists of the brain and the spinal cord as well as the other ganglia found in the body.