Structure of plants Flashcards
Main organs involved in transport are…
stems, roots and leaves.
Angiosperms are…
flowering plants.
Angiosperms can be…
monocotyledons or dicotyledons.
The epidermis is continuous…
layer on the outside of the plant, one cell thick, that provides protection.
The epidermis is covered with…
a waxy cuticle on stems and leaves. This is waterproof and helps organs to preserve water and protect them from infection.
Stomata are…
pores in leaves, which allow entry of CO2.
Parenchyma is made up of…
thin-walled cells used as packing tissue.
Cells in parenchyma are very…
metabolically active and may be used for many functions, such as for storage of food.
When parenchyma is turgid…
they help to support the plant, preventing wilting.
Air spaces between cells in parenchyma allow…
gases to exchange.
Parenchyma forms…
the cortex in roots, stems and pith in stems.
The cortex is…
an outermost layer of stem or root.
The pith is made of…
similar cells as the cortex, but it is the central region of a stem.
Parenchyma contains chloroplast in…
leaves, where it is modified to form the palisade and spongy mesophyll.
Collenchyma is modified…
form of parenchyma with extra cellulose deposits at the corners of the cells. This provides extra strength.
The midrib of leaves contains…
collenchyma.
Endodermis is one…
cell thick.
Endodermis surrounds…
the vascular tissue in stems and roots.
Mesophyll is made up of…
specialised parenchyma cells found between the lower and upper epidermis of the leaf.
Mesophyll is specialised for…
photosynthesis, so it contains chloroplast.
Spongy mesophyll has many…
large air spaces between the cells.
Palisade mesophyll cells are…
near the upper surface of the leaf where they receive more sunlight.
Pericycle is a layer of…
cells, one to several cells thick.
Pericycle is located just inside…
the endodermis and next to the vascular tissue.
Pericycle in roots is…
one cell thick and new roots are grown from this layer.
In stems, the pericycle is formed from…
a tissue called sclerenchyma. It has dead lignified cells for extra strength.
Vascular tissue is made of…
phloem and xylem.
In stems, phloem and xylem are found in…
vascular bundle.
