Cambridge O Level Biology · Syllabus 5090 · Development of Organisms and Continuity of Life
Amniotic Fluid
What is Amniotic Fluid?
The fluid held inside the amniotic sac around a developing fetus. It cushions the fetus against mechanical shock, allows the fetus to move, and provides a stable surrounding environment during development.
This definition is part of the Development of Organisms and Continuity of Life chapter in Cambridge O Level Biology.
Common mistakes with Amniotic Fluid
- “Amniotic fluid supplies the fetus with nutrients.” Why wrong That is the placenta's job. The fluid's roles are protection and movement. Say instead Amniotic fluid cushions the fetus against mechanical shock and allows it to move; nutrients cross the placenta.
Last reviewed Syllabus 2026-2028