The source, "20 Extraordinary Facts About the Human Body" from the YouTube channel "Institute of Human Anatomy," provides a collection of fascinating and often surprising anatomical and physiological facts. The video utilizes cadaveric demonstrations to illustrate the self-sustaining nature of the heart, the vast surface area of the lungs, and the developmental changes in the human skeleton. It also highlights the rapid regeneration of skin cells, the incredible filtering capacity of the kidneys, and the immense number of neural connections in the brain. Additionally, the video discusses the liver's regenerative abilities, the specific function of the pancreas, and the impressive daily output of saliva, ultimately revealing the human body as an incredibly complex and efficient biological marvel.