The filling of the lining
The uterus, or womb, is the stretchy body part where a baby can grow. Its inside is covered by a soft, thick lining called the endometrium.
Stromal cells are the filling of that lining. They sit in a soft, spongy layer, between little glands and tiny blood vessels.
Most of the time they are small and spindly, a bit like stretched-out stars.
Wow!
The womb lining can rebuild itself over and over again. Few other body parts can do that so often!