Astanga Hrudaya
मांसास्थिस्नायुधमनीसिरासन्धिसमागमः। स्यान्मर्मेति च तेनात्र सुतरां जीवितं स्थितम्॥३८॥
muscle, bones, tendons, arteries, veins and joints, is called marma life entirely resides in them (any injury or assault to these causes danger to life) they are indicated by the predominant structure found in them,
english translation