Plasma. Blood is composed of about 55% plasma and 45% formed elements (red blood cells, white blood cells, and platelets)
Did you mean mechanical ? If you do mean mechanical then here's the answer to your question:
Mechanical digestion is when the food is being broken down physically into smaller pieces from the mouth and chemical digestion is when the food is being broken down into substance particals starting from the saliva and proceeding through the small intestines.
