Firstly, that «the embryo has no precursors of nerves or blood, so it can not possibly know or experience anything» so it has «less complexity than
the simplest microscopic worm and less feeling or intelligence than a parasite in dirty drinking water».
So at day 14, the number of nerve and brain cells in the human embryo is zero, and it has less complexity than
the simplest microscopic worm and less feeling or intelligence than a parasite in dirty drinking water.
Not exact matches
The team at Salk started with a
simple creature, the
microscopic worm called Caenorhabditis elegans.