red blood cells
Red blood cell level decreased without swelling of the spleen, so the blood red blood cells weren't backing up into the spleen cuz the spleen is a reservoir for red blood cells. If you have a terrible bleed, you have like one and a half to two pints of red blood cells in the spleen.
So, if you have an accident, you lose two cups of blood or cup and a half of blood, you get the blood right back into the system, so you don't become anemic. And of course, if you were a caveman back in those days, you had a bleed, you'd be dinner if you were anemic. So, the spleen is a reservoir for red blood cells.