Human Growth and Development / Unit 11 HGD 1509 short lesson, about 20 seconds
The Physiological Peak
Captions available
The idea
In the early twenties people are at the peak of physiological development, including muscle strength, reaction time, sensory abilities and cardiac functioning.
In practice
Lung function, hearing and immune function also peaking, while height stops and sex characteristics complete.
Where people slip
Bone density keeps increasing into early adulthood, and genetic predispositions such as hypertension may begin to show.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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