Major difference between an open seam and a plain seam

The answer is below

Explanation:

Seam in surgery is a term that describes a form of flesh connection in an open wound often with stitches

Hence, in surgery Plain seam is a form of a simple seam that has been stitched and the above flesh is shoved to one side.

While on the other hand, the Open seam is also a form of a simple seam that has been stitched, and then the flesh is clasped clear.