1546819
Beschreibung
Mindmap von graciehoffs, aktualisiert more than 1 year ago
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Erstellt von graciehoffs
vor etwa 11 Jahre
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Xylem vs Phloem
- Phloem is made of living
cells when fully formed -
xylem is made of dead cells
- Xylem has lignin
impregnated into its
cell walls, phloem
doesn't
- Phloem tubes still
contain cytoplasm
and xylem doesn't
- The cytoplasm
extends from
cell-to-cell through
the sieve plate
- The cytoplasm
extends from
cell-to-cell through
the sieve plate
- Phloem cells have
companion cells
alongside that
control them
- Both are made
from long
columns of
cylindrical cells
that have been
joined together
end to end
- The xylem end walls
are completely broken
down whereas the
phloem has many
small holes in the end
walls making sieve
plates
- Both walls are made of
cellulose whereas walls of
xylem are also made of lignin
- Phloem contains
cytoplasm, the lumen
of a xylem vessel
contains water
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