'Occuring in birds & reptiles as well as mammals, it's the fluid-filled sac that surrounds an embryo'
Amniotic sac
LIFE: Occuring in birds & reptiles as well as mammals, its the fluid-filled sac that surrounds an embryo
Occuring in birds & reptiles as well as mammals, it's the fluid-filled sac that surrounds an embryo
Occuring in birds & reptiles as well as mammals, it's the fluid-filled sac that surrounds an embryo
LIFE
Amniotic sac
LIFE