The video features a series of close-up shots of neurons, which are the fundamental units of the nervous system. The neurons are depicted in a vibrant red color, with a central cell body and multiple protruding dendrites. The background is a deep black, providing a stark contrast that highlights the neurons. The animation is smooth, with the neurons gently pulsating, simulating the electrical activity that occurs within them. The video does not contain any text or subtitles.