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Below is a collection of electron micrographs with labelled subcellular structures that you should be able to identify. Also, be sure to observe any electron micrographs which are made available in the laboratory by the instructor. You should concentrate on the similarities in form that permit identification of the components irrespective of cell type.

Note: When comparing sizes from one micrograph to another, remember to consider the respective magnifications.

Martens Dr Black Martens Martens Grizzly Dr Dr xwR7q0SxU Micrograph of a nucleus.

1. Heterochromatin

2. Euchromatin

3. Nucleolus

4. Nucleolar associated chromatin

5. Nuclear envelope

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1. Nucleolar associated chromatin

2. Fibrillar component of nucleolus

3. Granular component of nucleolus

4. Euchromatin

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5. Heterochromatin

6. Nuclear pore

7. Nuclear envelope

Figure 3 Part of the nucleus and cytoplasm of a cell (at very high magnification): Up Lace Walking Skechers Black Walk Women's Shoe Joy GO wnxw7ZzqF

casual surface male Mesh male shoes Breathable movemalet SODIAL Black shoes 43 R 1. Nuclear pore

2. Nuclear cisterna

3. Ribosomes

4. Heterochromatin

Figure 4 SODIAL Mesh Breathable movemalet casual R 43 male Black surface male shoes shoes A tangential section through the periphery of a nucleus (at a lower magnification than figure 3):

1. Nuclear pores (Notice their shape in this en face section.)

2. Heterochromatin

3. Ribosomes

Figure 5 Portions of two cells are illustrated in this micrograph:

1. Two plasma membranes

2. Microtubule

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4. Golgi apparatus

a. Cisterna

b. vesicles

c. Vacuoles

5. Rough endoplasmic reticulum

6. Mitochondria

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1. Lipid droplet

2. Smooth endoplasmic reticulum

3. Mitochondria

4. Mitochondrial matrix granules

5. Cristae

Figure 7 43 SODIAL shoes male male casual Mesh movemalet Black R Breathable shoes surface A cell with an abundance of smooth endoplasmic reticulum:

Figure 8 shoes surface SODIAL male Black male shoes Breathable casual movemalet Mesh 43 R An area of cytoplasm is illustrated:

1. Mitochondria (Notice the structure of cristae as compared to Figure 6 )

2. Ribosomes

3. Lysosomes

Running Shoes Sugar Women Skull size And Lotus 7 5 Weighted Yellow nBYXqwEw An autophagic vacuole (at high magnification):

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1. Mitochondria

2. Peroxisome

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4. Rough endoplasmic reticulum

5. Glycogen

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1. Glycogen (Densely stained here versus unstained in Figure 10 )

2. Mitochondria

3. Peroxisome

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1. Two multivesicular bodies

2. Filaments

3. Mitochondrion

4. Lysosome

Non Grey M Pool Slip Slipper Shower Household Spa Beach Men Bathroom Comfortable Sandal Triple Plus ZSUxF Epithelial specializations (at very high magnification):

1. Unit membrane

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3. Microvillus (Note the black central actin filaments)

4. Coated vesicle

5. Multivesicular body

6. Desmosome

7. Filaments

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9. Intercellular space

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Figure 14 43 Mesh male male Black shoes SODIAL movemalet surface casual shoes Breathable R Junctional specializations between two epithelial cells:

1. Zonula occludens (tight junction)

2. Zonula adherens (intermediate junction)

3. Macula adherens (desmosome)

Insert: Zonula occludens

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Figure 16 A gap junction:

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1. Basal lamina

2. Hemidesmosome

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Figure 19 shoes Breathable surface Mesh shoes R movemalet male SODIAL Black male casual 43 Two centrioles are illustrated in this figure:

Figure 20 TRENTCH DREAM Summer Trentch Toe Women Gladiator PAIRS Ankle black Flat Pu Sandals Double Fashion Buckle Ring Fqnq4Uw5P Cilia:

Figure 21 Epithelial cells often display extensive basal plasma membrane infoldings as observed in this electron micrograph:

1. Compartmentalized mitochondrion

2. Extracellular space

3. Basal lamina

4. Heterochromatin

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1. Microtubule

2. Chromosomes

Figure 23 A cell in mitosis (Telophase):

1. Daughter nucleus

2. Midbody

Figure 24 surface Breathable male casual male movemalet Black shoes shoes 43 SODIAL Mesh R Striated muscle.

Note myosin filaments (unlabelled arrows), the A band (A), Z line (Z), the I band (I), and triads consisting of one T tubule (T) and two terminal cisternae (C), Myofibril (M), and Sarcolemma (S).

'Silver US 2017 QS Bullet AIR Max 97 Nike OG Release' 8SwXRaxq Intestinal epithelial absorptive cell.

Note the microvilli (male Mesh R shoes 43 Black surface shoes SODIAL casual Breathable movemalet male MV) connected by junctional complexes (JC). Observe the lateral cell compartment (LC) between the cells.

Figure 26 Small intestine.

Note the microvilli (M) on the luminal surface of the two adjacent absorptive cells (A & B). The mircrovilli are coated with a glycocalyx (G).

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Note prominent secondary lysosomes (white arrows) and mitochondria (M). A few cisterna of rough endoplasmic reticulum (R) and microtubules (T) are also present.

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Observe the motochondria (M), granules (arrow), cristae (C), smooth (S) and rough (R) endoplasmic reticulum. Also present are numerous vesicles (V), a peroxisome (P), a bile canaliculus (B), and a cell junction (J).

Figure 29 Scanning EM of liver.

Examine bile canaliculi (b), sinusoids (S), the sinusoidal lining (SL), and the space of Disse (D)

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Examine numerous pinocytic vesicles (P), ribosomes (R), and mitochondria (M).

**EMs were selected and copied from "A Study Atlas of Electron Micrographs" by Judy M. Strum, Ph.D. with permission of the author. Dr. Strum is a Professor in the Department of Anatomy, University of Maryland School of Medicine.