Encystment
The process of forming or becoming enclosed in a cyst or capsule.
Endarch xylem
A primary xylem strand in which the first-formed elements are
closest to the centre of the axis, as in the shoots of most spermatophyta.
Endangered species
A species that is in danger of extinction throughout all or a significant portion of its range.
Endemic species
Species that are confined to a specific, relatively small geographic area.
Endemic
An organism found only in one particular location.
Endergonic reaction
A nonspontaneous chemical reaction in which free energy is absorbed from the
surroundings.
Endocarp
The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or
cherries or olives) that contains the seed
Endocrine gland
A ductless gland that secretes hormones directly into the bloodstream.
Endocrine system
The internal system of chemical communication involving hormones, the ductless glands
that secrete hormones, and the molecular receptors on or in target cells that respond to
hormones; functions in concert with the nervous system to effect internal regulation and
maintain homeostasis.
Endocytosis
The cellular uptake of macromolecules and particulate substances by localized regions of
the plasma membrane that surround the substance and pinch off to form an intracellular
vesicle.
Endoderm
The innermost of the three primary germ layers in animal embryos; lines the archenteron
and gives rise to the liver, pancreas, lungs, and the lining of the digestive tract.
ff
(ff)
#1