Cattle have a bone in the heart. So do camels and otters. Humans, the anatomy textbooks say, do not.
Then medical examiners in Virginia sliced the conduction system out of a 39-year-old man's heart, cut it into thin sections, and found one.
Cattle have a bone in the heart. So do camels and otters. Humans, the anatomy textbooks say, do not.
Then medical examiners in Virginia sliced the conduction system out of a 39-year-old man's heart, cut it into thin sections, and found one.