If you leave them attached to the mom dog they're less likely to get lost.
Just look! On the tummy......1 has only an umbilical cord and the other has the umbilical cord and a penis.
The umbilical cord. The umbilical cord has the function of sending blood to the baby and returning blood from the baby after it has been utilized. There are two arteries in the umbilical cord that do this.
Don't worry about it.That's natures way.
newtest3eggs
The umbilical cord connects the navel of a fetus with the placenta. When the baby is born the umbilical cord is cut. The belly button is the location where the umbilical cord connected to the placenta.
Actually it's impossible... You can read more about the umbilical cord here: <a href="http://umbilical-cord-care.com">http://umbilical-cord-care.com</a>
not sure what you mean by "which of these" but the umbilical cord connects the embryo to the mother.
Umbilical cord.
Yes, when you miscarry, you will pass the umbilical cord.
Dogs, like all mammals, have belly buttons because they were attached to their mother's placenta through an umbilical cord before birth. The belly button is where the umbilical cord was attached and provided nutrients to the developing puppy in the womb.
The two structures that are connected by the umbilical cord are the embryo and the placenta. The umbilical cord is also known as the navel string or birth cord.
The umbilical cord is attached to the placenta and the placenta is attached to the wall of the uterus