Movie Theater
Sections of the Brain
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Script: 到3周， 头脑分成3个主要部分， 分别叫做前脑、 中脑 和后脑。 呼吸和消化系统 也在发育。 | ||
| All ages referenced to fertilization, not last menstrual period. |
The Embryo and Yolk Sac
Embryonic Development
Sections of the Brain
Body Cavity Formation
Amniotic Fluid
The Heart in Action
