a structure resembling a bag in an animal

of or relating to a chorion

any member of the Amniota

one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta

any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus

any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk

of or relating to a chorion

any member of the Amniota

one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta

any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus

any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk