Human Growth and Development / Unit 13 HGD 1811 short lesson, about 20 seconds
Skin and Sun
Captions available
The idea
Skin loses elasticity, thickness, water and fat with age, and sun exposure without protection adds spots, wrinkles and skin-cancer risk.
In practice
Two siblings of the same age, one with decades of unprotected sun and more wrinkles.
Where people slip
Sun damage is secondary aging, driven by behaviour and environment rather than by the calendar.
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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