caption: anatomical diagram of the heart on a paper sheet
exif: {"Image ImageDescription": "The heart is a myogenic muscular organ found in all animals with a circulatory system (including all vertebrates), which pumps blood throughout the blood vessels by repeated, rhythmic contractions, 1903. From 'Surgical Anatomy: The Treatise of the Human Anatomy and Its Applications to the Practice of Medicine and Surgery, Volume III' (1903). (Photo by VintageMedStock/Getty Images)"}