Ovary
There is no such thing as an "ovarian sac". The amnion is a membrane building the "amniotic sac" that surrounds and protects an embryo.
Ovary
Ovarian follicle
placenta
are membrane that helps
An ovarian cyst is a sac of fluid that forms on or in an ovary. An ovarian cyst with coefficient 7.813 is considered to be moderately abnormal.
this is called the placenta
It is normal for the sac and the placenta to come out with each puppy. It is also normal for the mother to EAT the sac and the placenta.
This is the birth sac that needs to be removed so the baby can start to breathe. If you are talking about the sac that shows on an ultrasound, this is the amniotic sac that contains the 'waters' and is absolutely necessary for the growth of the baby. It is the same thing that the answer above mentions.
an ovarian cyst is closed, sac like structure within an ovary that contain a liquid, gaseous or semisolid substance.
When an ovarian cyst ruptures, the fluid ends up in the cul-de-sac due to gravity.