Medulla
Definition of Medulla
Me`dul´la
n.
1.
Marrow
;
pith
;
hence
,
essence
.
2.
(Anat.)
The
marrow
of
bones
;
the
deep
or
inner
portion
of
an
organ
or
part
;
as
,
the
medulla
,
or
medullary
substance
,
of
the
kidney
;
specifically
,
the
medula
oblongata
.
3.
(Bot.)
A
soft
tissue
,
occupying
the
center
of
the
stem
or
branch
of
a
plant
;
pith
.
4.
See
medulla
oblongata
.
Medulla oblongata
(Anat.)
the
posterior
part
of
the
brain
connected
with
the
spinal
cord
.
It
includes
all
the
hindbrain
except
the
cerebellum
and
pons
,
and
from
it
a
large
part
of
the
cranial
nerves
arise
.
It
controls
very
largely
respiration
,
circulation
,
swallowing
,
and
other
functions
,
and
is
the
most
vital
part
of
the
brain
; -
called
also
bulb
of
the
spinal
cord
.
See
Brain
.
Related Words
fat
,
medullary
sheath
,
myelin
,
myelin
sheath
,
myeline
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