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The leave ,stem and root
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Lethabo Lekgothoane
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the plant anatomy and physiology
The leave ,stem and root
34 cards
Cards (70)
A stem supports
leaves
above ground level and transports
water
from roots to leaves.
Leaves are usually
flat
structures with veins running through them to carry
water
, minerals and sugars around the plant.
The
leaf
is the part of the plant that carries out
photosynthesis
Roots absorb water and minerals from soil,
anchor plants
into the ground and
store food
Root hairs increase surface area so more
nutrients
can be
absorbed
by the plant
Leaves are made up of
two
main parts - the blade (lamina) which contains
chloroplasts
and the petiole which attaches it to the stem
The
leaf
is where
photosynthesis
takes place
Roots absorb water and
mineral salts
from soil and
anchor plants
firmly into the ground.
Roots absorb
water
and nutrients from
soil
Plants use their
stems
as a means of
support
because they do not have legs or feet like animals
Stems support leaves and flowers above the ground and transport
water
and
dissolved mineral salts
throughout the plant
Taproot
- main root which grows
vertically
downwards and has lateral roots growing off it
Stems have three functions; support,
transport
and
storage
Fibrous
Roots - Many small roots grow
directly
from the base of the stem
Taproot
- A single main root which grows downwards and has
smaller lateral
roots growing off it
Plants have different types of roots such as
taproots
,
fibrous
roots and adventitious roots
Root nodules contain bacteria which convert
nitrogen
gas into
ammonia
(a form of nitrogen that plants can use)
Fruits
develop from
flowers
and contain seeds.
Stems support leaves and flowers above the ground and transport
water
and
dissolved minerals
throughout the plant
Apical
meristem
produces new
cells
at the tip of the shoot
Flowers contain male reproductive organs called
anthers
and female reproductive organs called
ovaries.
Transportation occurs when substances such as water,
glucose
and
oxygen
move between different parts of the plant
Axillary buds
grow at the base of the
leaves
on stems
Stems support leaves above the ground and transport
water
and
dissolved minerals
throughout the plant.
Fibrous
Roots - many fine roots grow
horizontally
close together
Stems also store
food reserves
such as
carbohydrates
Vascular bundles are long tubes containing
xylem
and
phloem
tissue
Stems transport
water
, minerals and
sugars
around the plant
Stems also contain
vascular
bundles that carry
water
and dissolved minerals around the plant
The
leaf
is an organ that carries out
photosynthesis.
Taproots
are long, thick, single-tapering roots that extend
vertically downward
from the seedling's tip
Adventitious
Roots - develop at points other than the tip of the stem e.g. on the
lower
side of a stem node
Leaves
are
flat
structures that grow on top of the stem
Fibrous
Root System - many fine, short roots grow
horizontally
close to the surface of the soil
Adventitious roots
develop on any part of the plant other than the
primary root
Aerial roots
grow out of the stem, usually near the base of an epiphyte, and serve to attach the plant to its
host tree
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