So I'm pretty sure your are all aware of what a cell is the microscopic organic units that make up all life.
Well they don't have to be microscopic. An unfertilized chicken egg is a single cell. Here in this link is record of one of the largest single cells on earth. It's a whale shark egg; it's a foot long, 5.5 inches wide, and 3.5 inches thick. Almost the size of my head. I think this one is the largest single cell organism in the world (Caulerpa taxifolia). So I know cells can be supersized.
So I really want to know could there realistically be a unicellular life form about the size of a human that could eat/absorb other organisms and survive in the wild? Or is it impossible because it would be really weak, pop like an chicken egg and die instantly?