3 ч 29 мин, 29 сент 2002 г. - First Trimester: Placenta
Описание:
Around the 5th week of this trimester the placenta is developed. The placenta provides the growing embryo with oxygen and nutrients it needs. The placenta also removes waste from the blood of the embryo.Добавлено на ленту времени:
Дата:
3 ч 29 мин, 29 сент 2002 г.
Сейчас
~ 23 г назад