High power electron micrograph of a human myotube grown in cell culture showing the irregular shaped nuclie with peripheral aggregates of contractile proteins with electron densities characteristic of z-band formation. Several elongated mitochondria can be seen scattered throughout the cytoplasm.
Bar = 2000nm 

This is a high power electron micrograph showing the cytoplasm of a 21-day-old myotube. A sarcomere pattern can be clearly identified showing Z-bands, M-bands (myosin) and I-bands (actin) which the basic contractile unit of skeletal muscle.
Bar 2000nm 

Low power electron micrograph of hepatocytes (liver cells) showing the characteristic round nucleus with heterochromatin clumping and margination with a prominent nucleolus, top right hand corner. Cytoplasm contains copious glycogen, mitochondria, cytoplasmic vesicles and a small homogeneous semi-electron dense vacuole is present which is characteristic of lipid droplet.
Bar =10um 

The electron micrograph consists of four hepatocytes taken at high power. Part of a nucleus showing chromatin clumping and margination is present in the bottom left hand side of the image. The cytoplasm contains small strands of rough endoplasmic reticulum (RER), mitochondria, copious glycogen and a large homogeneous semi-electron dense lipid vacuole. Aggregates of small round electron dense viral particles can be seen surrounding the lipid vacuole and scattered throughout the cytoplasm. The viral particles are suggestive of HIV particles.
Bar = 2000nm

Low power electron micrograph of a lung biopsy of patient with histocytosis X. The alveolus is patent and lined by type I and II pneumocytes, There is enlargement of the alveolar wall due to infiltration of inflammatory cells, several polymorph leucocytes and scanty large mononuclear cells can be seen within the wall.

Low power electron micrograph of a metastatic mesothelioma taken from the base of the pelvis. The image is composed of loosely aggregate of tumor cells, considerable portion of the cell surfaces are covered with microvilli. The microvilli are profuse, long, branching, curved and slender, with an absence of well-defined rootlets. The cytoplasm contains numerous mitochondria, aggregates of cytoplasmic filaments (vimentin filaments) and dilated segments of rough endoplasmic reticulum. The nuclei are somewhat irregular showing chromatin clumping and margination with prominent nucleoli. Adjacent cells are joined by long well developed desmosomes.
Mag 6000x

Low power electron micrograph of two muscle fibers showing the characteristic myofibrillary pattern. The fibrils are long and non-branching. Sarcomeres show a normal sarcomeric pattern with no disruption. A small clump of three myonuclie can be is seen in the bottom of the image which appear normal. There is no thickening of the basal lamina. Aggregates of pleomorphic mitochondria are present scattered throughout the fiber and within the para-nuclear space. A prominent small blood vessel can be seen lying between the two fibers. These changes are nonspecific.
Bar = 10um 

The electron micrograph consists of part of a small atrophic myofiber showing loss of myofilament, taken at a high power. There is total loss and disruption of the normal sarcomeric pattern. Small aggregates of contractile filaments can be seen within the cytoplasm, top right hand corner. The myonucleus is present showing condensation of the chromatin with margination and clumping. This biopsy was taken from a patient with Duchenes Muscular Dystrophy.
Bar 1000 nm

Low power electron micrograph of a nerve biopsy. The image consists of a portion of a transverse section of a nerve fascicle. The perineurium is present, top of the image, with normal flattened polygonal perineurial cells lying in a lamellar formation. The matrix consists of myelinated fibers of varying sizes with clusters of unmyelinated nerves. Several Schwann cells can be identified. Several nerves are enlarged showing thickening of the myelin. In the center of the image a typical ovoid is present showing loss of its axon. Many of the axons are exhibiting shrinkage and vacuolation. There is a definite increase in collagen bundles.
Mag 5,500x

The image is a high power electron micrograph taken from the body of nerve fascicle shown in the above image. Several enlarged myelinated nerves showing early Wallerian degeneration can be seen. Many of the axons present exhibit varying degrees of vacuolation.

Low power electron micrograph of a patient with SLE. The image shows Schwann cells devoid of axons and myelin. There are clusters of non-myelinated nerves showing axonal degeneration. These ultrastructural changes are characteristic of a demyelinating process.

The electron micrograph consists of a low power image taken from the alfalfa plant showing normal plant root cells. The plant cells are surrounded by a rigid, amorphous structure known as the cell wall. A plant nucleus can be clearly identified in one of the cells. Several chloroplasts are present showing the stroma with their characteristic thykaloid sacs. The vacuole or tonoplast is a large single membrane structure occupying approximately 70-90% of the cells present leaving a narrow peripheral area of cytoplasm along the cell wall.
Bar 10 nm. 

Low power electron micrograph of plant tissue showing plant cells with rigid cell wall taken from the alfalfa plant. The plant cell nuclei are present in many of the cells. There is vacuolation of the cytoplasm with some of the cells showing the characteristic tonoplast. Small-elongated ovoid structures can be identified lying in the rims of cytoplasm lying close to the cell wall. These structures are characteristic of rhizobium bacteria, nitrogen fixation bacteria that form nodules on the root hairs and root of plants.
Bar = 10um 

High power of image 2 showing the thin rim of cytoplam lying close to the cell wall. Within the cytoplasm the elongated ovoid structure, rhizobium bacilli bacteria, are seen surrounded by a single membrane. The thick bacteria cell wall can be easily recognized.
Bar = 1000nm 

IgA glomerulonephritis. An electron micrograph of a kidney biopsy from a 32 year old female patient. The mesangium is markedly enlarged with profiles of four mesangial cell nuclei. The matrix bars are prominent occupying most of the cytoplasm. Large amounts of mesangial and paramesangial of electron dense deposits of IgA immunogloblin are obvious. The endothelial cells are swollen taking up most of the urinary space,
Mag x3200