True.
systolic is the pressure on the walls of the vessels during ventricular systole, or when the heart is contracting, and diastole is the pressure exerted during the time the heart is relaxed.
The time it takes for dissolvable or absorbable stitches to disappear can vary. Most types should start to dissolve or fall out within a week or two, although it may be a few weeks before they disappear completely. Some may last for several months.