simple plant organs

sapwood

outer layer of wood that transports water and minerals into the tree trunk

pith

central tissue of a dicot system and central root

sessile

leaves that arise directly from stems

dicot

class of angiosperms whose seeds have 2 cotyledons

cork cambium

cells between vascular tissue and exterior of a woody root/stem, makes cork

node

area of a stem where one or more leaves are attached

monocot

class of angiosperms whose seeds have 1 cotyledon

vascular cambrium

meristematic tissue that generates xylem and phloem

whorled

having 3+ leaves at a node

blade

flat part of a leaf

pinnate venation

having veins on both sides of a common axis where they’re attached

heartwood

non-living wood whose cells no longer conduct water

suberin

fatty substance found in cork cells

petiole

stalk of a leaf

abscission

things naturally falling off a plant (fruit, leaves, flowers)

parallel venation

veins that are parallel

senescence

the breakdown of cell parts that lead to its death

lenticel

allows gas exchange at the cork layer of woody plants

transpiration

loss of water through the leaf

internode

area of stem between nodes

pneumatophore

spongy root that sits above the water to collect oxygen

mesophyll

parenchyma tissue between upper and lower dermis of a leaf

herbaceous

not woody plants

apical meristem

meristem at the tip of a shoot/root

ground meristem

meristem that produces the primary tissue minus the epidermis and stele

palmate venation

having veins come out from a common point

guard cells

1 pair of cells surrounding the stoma

cortex

between the epidermis and vascular tissue, made of mainly parenchyma cells

stipule

small leaflike structure that are at the junction of leaf petioles and stems