Download Animal Cell Electronmicrographs

Typical Animal Cell
Blood cell from the insect
Agallia constricta showing
showing typical cellular
organelles The large
central nucleus (N) is
surrounded by a dense
cytoplasm containing
endoplasmic reticulum
(ER), ribosomes (R),
mitochondria (M), and a
golgi apparatus (GA)
Magnification 5 650X
Nucleus
Nucleus from an insect
(Estigmene acrea) nerve
cell. Note the dense
nucleolus (Nu), and the
chromatin dispersed
through the nucleus but
with some local
aggregations. A double
envelop (NE) surrounds
the nucleus.
Magnification 5 100X
Nucleolus
Nucleolus from a salt
marsh caterpillar
(Estigmene acrea) fat
body cell. The nucleolus
(Nu) consists of an
extremely fine-textured
matrix material within
which are embedded
granules (arrows) about
15 nanometres in
diameter.
Magnification 27 500X
Nuclear Envelope
Nuclei are surrounded by
a double membrane
known as a nuclear
envelope (NE). The
envelope is penetrated by
large nuclear pores
(arrows), 100 nanometres
in diametre.
Magnification 27 500X
Nuclear Pores
Tangential section
through the nuclear
envelope of an insect
(Estigmene acrea)
intestinal cell. Note
circular nuclear pores
(arrows) approximately
100 nanometres in
diametre.
Magnification 8 400X
Endoplasmic Reticulum
Section through an
intestinal cell of
Estigmene acrea showing
the cytoplasm packed
with rough surfaced
endoplasmic reticulum
(RER)
Magnification 8 400X
Glycogen
Glycogen (Gy) in animal
cells is usually in the form
of conspicuous rosettes
of varying size. The
rosettes are composed of
isodiametric, 15 – 30
nanometre particles.
From the insect
Estigmene acrea.
Magnification 8 400X
Ribosomes
Ribosomes isolated from
the fat body cells of the
gypsy moth Porthetria
dispar. Single (A)
ribosomes and clusters
(B) of ribosomes
(polyribosomes) are seen
at high magnification.
Each ribosome is
approximately 22
nanometres in diametre.
Magnification 60 000X
Golgi Apparatus
The golgi apparatus (GA)
consists typically of a
series of double
membranes
concentrically bent. Along
the periphery of the
membranes, small round
golgi vesicles (GV) ligate.
From the insect,
Estigmene acrea.
Magnification 27 400X
Mitochondrion
A mitochondrion from the
insect Agallia constricta.
The mitochondrion is
surrounded by a double
envelope consisting of an
inner and an outer
membrane (arrows). The
inner mitochondrial
membrane invaginates to
form cristae (C).
Magnification 27 500X
Microvilli
Fine structure of the
apical border of a mid-gut
epithelial cell from the
insect E. acrea. Apical
cell membrane (arrows) is
extended at regular
intervals along microvilli
(Mv). Note fine fibrils (F)
oriented along the length
of the microvilli
Magnification 27 500X
Muscle Fibres
The striped flight muscles
of the mosquito (Culex
pipiens) cut longitudinally.
The light I band is
bisected by the Z line
where the actin filaments
are joined to one another
laterally.
Magnification 9 000X
Desmosome
The fine structure of the
intercellular junction in
the mid-gut of the insect
Estigmene acrea. The
apposed lateral cell
membranes are linked
together by the regular
array of transverse
structures characteristic
of septate desmosomes
(SD).
Magnification 27 400X
Mitotic Cell
Mitosis in a culture cell of
the insect Agallia
constricta. Chromosomes
(Ch) are aligned in a
metaphase plate. Note
several spindle fibres
(SF) which appear to be
attached to the
chromosomes.
Magnification 4 800X
Chromosomes
Part of a metaphase plate
showing the rather
indefinite outline of the
chromosome (Ch) and
the tubular spindle fibres
(SF) some of which
appear to be attached to
the chromosomes. From
the embryonic cells of the
insect Agallia constricta.
Magnification 8 000X
Nerve Axons
Section through a central
ganglion of the insect E.
acrea. Many axons (Ax),
each containing many
neurotubules (Nt) and
mitochondria (M) are
seen in transverse
section.
Magnification 9 000X
Pinocytotic Vesicles
Mid-gut epithelial cell
from the insect
Estigmene acrea.
Between the microvilli,
small pits are formed
which pinch off into the
cell as pinocytotic
vesicles (arrows and PV)
Note the endoplasmic
reticulum with ribosomes
attached to it.
Magnification 27 400X
Lysosomes
Lysosomes (Ly) and
multivesicular bodies
(MVE) in an intestinal cell
of the insect Agallia
constricta. Both
organelles are
membrane-bound and
contain a number of
hydrolytic enzymes.
Magnification 27 400X
Lipid Inclusions
Part of a fat body from
the insect Agallia
constricta. Large lipid
droplets (L) and many
clusters of glycogen
granules (Gy) are
present.
Magnification 4 000X
Basement Membrane
The basement membrane
(BM) follows the contour
of the base of a mid-gut
epithelia cell from the
insect Estigmene acrea
larva. Note the irregular
enfolding of the plasma
(PM) and the many
mitochondria which lie in
the resulting narrow
cytoplasmic sheets.
Magnification 8 100X
THE END