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41 terms

Specialized Cells

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Dermal tissue
outer covering or "skin" of a plant
ground tissue
tissue between the dermal tissue and vascular tissue of a non-woody plant that functions in photosynthesis, storage, and support
epidermis
the outer layer of the skin covering the exterior body surface of vertebrates
cork
a small float usually made of cork
sieve tube
tube formed by cells joined end-to-end through which nutrients flow in flowering plants and brown algae
cortex
the layer of unmyelinated neurons (the gray matter) forming the cortex of the cerebrum
root hair
thin hairlike outgrowth of an epidermal cell just behind the tip
root cap
thimble-shaped mass of cells covering and protecting the growing tip of a root
vascular bundle
a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
pith
the choicest or most essential or most vital part of some idea or experience
cuticle
hard outer covering or case of certain organisms such as arthropods and turtles
stomata
the small openings on the undersides of most leaves through which oxygen and carbon dioxide can move
xylem
the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
phloem
(botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed
taproot
something that provides an important central source for growth or development
fibrous root
part of a root system in which roots branch to such an extent that no single root grows larger than the rest
adventitious root
root growing in an unusual location e.g. from a stem
legumes
vegetables
dicot
flowering plant with two cotyledons
monocot
a monocotyledonous flowering plant
endosperm
nutritive tissue surrounding the embryo within seeds of flowering plants
mesophyll
The ground tissue of a leaf, sandwiched between the upper and lower epidermis and specialized for photosynthesis.
transpiration
the emission of water vapor from the leaves of plants
apical meristem
Embryonic plant tissue in the tips of roots and in the buds of shoots that supplies cells for the plant to grow in length.
seed germination
a process by which a seed embryo develops into a seedling
gymnosperms
seed plant that bears its seeds directly on the surfaces of cones
angiosperms
flowering plants
anther
the part of the stamen that contains pollen
stamen
the male reproductive organ of a flower
pistil
the female ovule-bearing part of a flower composed of ovary and style and stigma
pollination
transfer of pollen from the anther to the stigma of a plant
stigma
a skin lesion that is a diagnostic sign of some disease
gametophyte
the gamete-producing individual or phase in the life cycle of a plant having alternation of generations
sporophyte
the spore-producing individual or phase in the life cycle of a plant having alternation of generations
tropism
an involuntary orienting response
source
anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies
sink
a covered cistern
translocation
the transport of dissolved material within a plant
gibberlins
promote stem lengthening, helps buds and seeds break dormancy and influence flowering (active in spring)
abscisic acid
plant hormone that inhibits cell division in buds and vascular cambium
auxin
a plant hormone that promotes root formation and bud growth