胎盤

胎盤，係一種淨係喺雌性哺乳類動物有娠紀嗰陣或者係每一隻哺乳類動物重係個胎嗰陣時先有嘅暫時器官，位置喺子宮內側嘅表面。胎盤負責分開媽咪同埋個胎啲血，同埋會分泌hCG令到子宮內膜保持住一定嘅厚度。

拎

Additional Human placenta photography
 The Placenta, gynob.com, with quotes from Williams Obstetrics, 18th Edition, F. Gary Cunningham, M.D., Paul C. MacDonald, M.D., Norman F. Grant, M.D., Appleton & Lange, Publishers.

器官