Definition: The word "Applacentalia" is a term in medical literature that refers to the first placenta, or initial fetal lung, formed during pregnancy. It's also known as the primary placenta. This tissue is responsible for delivering oxygen and nutrients to the developing baby. The primary placenta develops from the endometrium (uterine lining), which starts before implantation but begins to form around the 20th week of gestation. The word 'Aplacentalia' was first used in medical literature by William J. Nadel in 1968 when he described it as "the most advanced fetal lung". This term was coined after a study examining the development of fetal lungs in rats with congenital abnormalities, which demonstrated that it appeared to be the most developed one.

Aplacentalia

Definition: The word "aplastic" refers to a term in biblical Greek, referring to the womb-like area at the end of pregnancy where the placenta resides. This part of the uterus is known as "aplastia." It's important to note that the exact meaning and context of this term varies depending on its use in various contexts from Greek mythology to biblical stories.

aplacental