Human Growth and Development / Unit 3 HGD 0303 short lesson, about 20 seconds
Length and Head Size
Captions available
The idea
Infants grow about an inch a month in the first year; at birth the head is about one-quarter of body length, against one-eighth in adults.
In practice
A newborn unable to hold up a head that is so heavy for its small body.
Where people slip
Head circumference is positively correlated with cognitive functioning.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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