Keywords: Life in Motion Fig 48.png en Fig 48 ”Diagram showing hypothetical views as to the structure of striated muscle Four fibres side by side a clear bands or discs each formed of two clear bands or discs termed the lateral discs of Engelmann separated by a thin dark line or band known as Dobie's line or Krause's membrane; b two discs of dark substance forming the sarcous elements of Bowman having in the centre an ill-defined band or line the median disc of Hensen; a is singly and b is doubly refractive as regards light Life in Motion or Muscle and Nervehttps //archive org/details/b21929786 John Gray McKendrick 1892 1926 Life in Motion book Muscle fibers |