All mammals, including giraffes. Have a nerve that starts in the head, goes all the way down to the heart, loops through an artery, and then goes all the way back up. In giraffes this means this nerve goes 6ft each way to do nothing. If I remember right this is because when we had gills it was a straight shot.
All mammals, including giraffes. Have a nerve that starts in the head, goes all the way down to the heart, loops through an artery, and then goes all the way back up. In giraffes this means this nerve goes 6ft each way to do nothing. If I remember right this is because when we had gills it was a straight shot.