Page 137 - Ultimate Visual Dictionary (DK)

STEMS
MICROGRAPHS OF CROSS-SECTIONS THROUGH VARIOUS STEMS Prickle
(outgrowth of epidermis)
Epidermis
(outer layer Vascular cambium Sclerenchyma
of cells) (actively dividing (strengthening
cells that produce tissue)
xylem and phloem)
Collenchyma
Secondary
(supporting
tissue) phloem
Pith
cavity Secondary
xylem Pith
Pith
Primary
xylem
Xylem Cortex
Vascular Cortex Epidermis (layer between
bundle Phloem (layer between (outer layer epidermis and
epidermis and of cells) with thick cuticle vascular tissue)
vascular tissue)
CHERVIL (waterproof covering) ROSE
(Anthriscus sp.) (Rosa sp.)
Secondary Sclerenchyma Mesophyll
Collenchyma phloem Secondary (strengthening (layer of
(supporting xylem tissue) photosynthetic
tissue) tissue)
Pith with stellate
parenchyma Vascular
Primary (star-shaped bundle
xylem packing
tissue)
Epidermis
(outer layer Xylem
of cells) Pith
Phloem

Epidermis
Pith (outer layer Sclerenchyma
cavity of cells) with thick (strengthening
Cortex cuticle (waterproof tissue)
(layer between covering)
epidermis and DEADNETTLE RUSH
vascular tissue) (Lamium sp.) (Juncus sp.)
Parenchyma Vascular bundle
Epidermis (packing tissue) with (xylem, phloem,
(outer layer of cells) bundles of sclerenchyma and sclerenchyma
Phloem (strengthening tissue) fibers)
Vascular
Xylem tissue
Lacuna
(air space) Epidermis
(outer layer
of cells)

Pith

Cortex
(layer between Mesophyll
epidermis and (layer of Cortex
vascular tissue) Endodermis photosynthetic (layer between
(inner layer tissue) epidermis and
MARE’S TAIL of cortex) COCONUT PALM vascular tissue)
(Hippuris vulgaris) (Cocos nucifera)
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