Question

when necessary, knee replacement surgeries are done to alleviate worn - out knee joints. the incision is vertical and leaves an obvious scar. however, if the incision was horizontal, the scar would be minimal. why is that? question answer the incision was made at a right angle to the cleavage lines. the scarring depends on the expertise of the surgeon. the incision was made parallel to the cleavage lines. i dont know yet

Explanation:

When incisions are made parallel to the cleavage lines of the skin, the scarring is minimal as these lines follow the natural orientation of collagen fibers in the dermis, allowing for better healing and less disruption to the skin's structure.

Answer:

The incision was made parallel to the cleavage lines.