The earliest known use of blood spatter evidence was in:

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;