Amniotic sac
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The amniotic sac, also called the bag of waters or the membranes, is the sac in which the embryo and later fetus develops in amniotes. It is a thin but tough transparent pair of membranes that hold a
The amniotic sac opened during afterbirth examination
Placenta with attached fetal membranes (ruptured at the margin at the left in the image).
Amniotic fluid
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The amniotic fluid is the protective liquid contained by the amniotic sac of a gravid amniote. This fluid serves as a cushion for the growing fetus, but also serves to facilitate the exchange of nutri
Amniotic sac
…developing embryo (and later fetus) until shortly before birth. The inner of these membranes, the amnion, encloses the amniotic cavity, containing the amniotic fluid and the embryo. The outer membrane, the chorion, contains the amnion and is part of the placenta. On the outer side, the amniotic sac is connected to…
Ten-week-old human fetus surrounded by amniotic fluid within the amniotic sac
Tubes filled with amniotic fluid for amniocentesis