Misc: What animals eye is bigger than its brain?

Questions

During a lifetime, one person generates more than ---------- pounds of red blood cells.?

During a lifetime, one person generates more than 1,000 pounds of ---------- blood cells.?

During menstruation, the sensitivity of a woman's middle finger is---------- .?

Each square inch of human skin contains seventy-two feet of---------- .?

Every ---------- spent about half an hour as a single cell.?