The anatomical juxtaposition of 2 orbicularis oris muscles in a state of contraction.
Dr. Henry Gibbons
John Heysham Gibbon was an American surgeon best known for inventing the heart–lung machine and performing subsequent open-heart surgeries which revolutionized heart surgery in the twentieth century. He was the son of Dr. John Heysham Gibbon Sr., and Marjorie Young Gibbon, and came from a long line of medical doctors including his father, grandfather Robert, great-grandfather John and great-great grandfather.