What is the placenta in a dog? - briefly
The placenta in a dog is a temporary organ that develops during pregnancy and plays a critical role in nourishing and protecting the growing fetus. It facilitates the exchange of nutrients, oxygen, and waste products between the mother's bloodstream and the developing puppies.
What is the placenta in a dog? - in detail
The placenta in dogs, also known as the yolk sac or allantois, is a vital organ that plays a crucial role during pregnancy. It develops from the same cells that eventually form the puppies and serves as the primary source of nourishment for the developing fetuses. The placenta produces various hormones, including progesterone, which helps maintain the pregnancy by preventing the uterine muscles from contracting prematurely. Additionally, it acts as a barrier, protecting the growing puppies from potential infections and immune system attacks. In dogs, the placenta is composed of multiple small, individual placentas called zonary placentae, which are attached to the uterine wall. These structures enable efficient nutrient exchange between the mother and her offspring. After delivery, the placenta detaches from the uterine lining and is expelled as part of the afterbirth, signaling the end of pregnancy.