because it allows the baby to pass
The Uterus.
The uterus has thick walls because a fertilized egg would need a thick lining in order to implant and begin to grow and develop. The uterus is sterile and has no bacteria present, however large quantities of debris and bacteria is brought into the uterus with the sperm. Therefore, the walls must be strong and muscular because uterine contraction has to occur to expel fluid, dead sperm and bacteria out from the uterus and through the open cervix.
The uterus is designed to be muscular because it has to bear a lot of weight.
The "muscular neck" of the uterus is called the cervix.
Endometrium is found on the inside walls of the uterus.
Endometrium is found on the inside walls of the uterus.
uterus
That would be the uterus, my good fellow. Or the womb.
Myometrium.
Myometrium
At implantation, it is a blastula that attaches itself to the walls of the uterus.
do cappilaries have muscular walls