අම්මගෙ ලේයි දරුවගෙ ලේයි එකට මිශ්ර වෙන්නෙ නෑ
- The placenta is the reason that the mother's blood is not mixed with the fetus but it still provides it nutrition.
- It is a temporary tissue in mammals that act as a barrier and gets developed during pregnancy.
Last edited: