Keywords: Life in Motion Fig 07.png en Fig 7 ”The gastrocnemius muscle of a frog prepared for experiment F femur bone of the leg; N sciatic nerve ending in muscle at n; J tendon of Achilles with a small hole in it for a hook Life in Motion or Muscle and Nervehttps //archive org/details/b21929786 John Gray McKendrick 1892 1926 Life in Motion book Anura muscles |