Sunday, October 26, 2008

Useless Information #1010

In the beginning, actually in your beginning, say a few days into gestation, you were a tiny little ball of cells, hollow, each one identical still. A blastosphere. Eventually, one side of the ball caved in, like an under inflated kickball, thus becoming a blastopore.

Now, in the lower animals, this blastopore becomes the opening for the digestive system. The only opening. These animals have two-way digestion- food goes in and out the same hole.

In deuterostomes (us, sea urchins,etc), however, this opening becomes the anus. The first thing you ever were was an anus.

Some people stopped right there, didn't they?


Anonymous said... indeed, they did!......


Joan of Argghh! said...

That was elegant!


Mrs. Who said...'s usually the boss who stopped at that level of development.