No it can not.
in the blood
well a blood cell is only one cell and all of them usually live in the blood stream unless you get cut or get a blood blister or you get internal injuries.
Amoeba
Organism.
it would be a organism.
no
they need the heart to pump them
120 days
you can't the closest you can get is your own blood
One example of a cell that can live on its own is an "organelle." Organelles are found inside eukaryotic cells and perform specific functions to keep the cell alive and functioning properly.
Artificial blood is a 'man made' product.It's a special blood cell which can live in people, animals and even sometimes plants.
The white blood cell has nucleus that red blood cell does not