Psychology / Unit 8 Psych 0867 short lesson, about 20 seconds
The Embryonic Stage
Captions available
The idea
The embryonic stage runs from implantation through week eight, when major organ systems and the neural tube form.
In practice
The heart begins beating and the neural tube closes within this window.
Where people slip
This is the period of greatest vulnerability, and it largely precedes awareness of the pregnancy.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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