Biology / Unit 11 Bio 2511 short lesson, about 20 seconds
Stem Anatomy: Parenchyma, Collenchyma, Sclerenchyma
Captions available
The idea
A stem's ground tissue is built from parenchyma cells for metabolism and storage, collenchyma cells for flexible support, and sclerenchyma cells for rigid support.
In practice
Celery's fibrous "strings" are collenchyma; a pear's gritty texture comes from sclereids, a sclerenchyma cell type.
Where people slip
Sclerenchyma cells provide support though most are dead at maturity — a rigid cell wall outlives the cell itself.
Your place on the trail
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