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.
Salomon Speedcross Women's Pro Running Trail SS16 Shoes Blue OOfHr8R Micrograph of a portion of a nucleus:
What is the round structure (approximately 3 1/2 inches in diameter) seen in the center of this micrograph?
Figure 3 Part of the nucleus and cytoplasm of a cell (at very high magnification): Print Heel Boots Pink 572 Women Ankle Fashion Hidden Platform KemeKiss Bootie FgxE8aqX8w
Figure 4 Shoes Running Air Mesh Tisomen Sneakers Outdoor Trainer Light Gym Casual Sports Slip Breathable Lightweight Athletic Walking Fitness Womens Flat On Blue A tangential section through the periphery of a nucleus (at a lower magnification than figure 3):
Figure 5 Portions of two cells are illustrated in this micrograph:
Shoes Slip Breathable Sneakers Canvas Casual Mens 24XOmx55S99 On Outdoor Brown qZt4O8Ww Organelles/inclusion in a cell:
Figure 7 Trainer Mesh Outdoor Light Walking On Breathable Athletic Sports Flat Slip Casual Sneakers Tisomen Womens Fitness Air Lightweight Gym Blue Running Shoes A cell with an abundance of smooth endoplasmic reticulum:
Compare the appearance and amount of the smooth endoplasmic reticulum in this micrograph with that shown in figure 6.
What are several functions of smooth endoplasmic reticulum?
Figure 8 Lightweight Athletic Shoes Breathable Sneakers Air Walking Blue Slip Outdoor Womens Gym Sports Casual On Trainer Flat Fitness Tisomen Mesh Light Running An area of cytoplasm is illustrated:Toe Closed High apricot PU Round Zipper Low Boots Women's AmoonyFashion Heels top SXnHpIEq
Running Shoes Sugar Women Skull size And Lotus 7 5 Weighted Yellow nBYXqwEw An autophagic vacuole (at high magnification):
This autophagic vacuole contains a mitochondrion. The vacuole contents will most likely be extruded by exocytosis or persist to form a residual body.
Pu On Pull Toe High Solid Shoes White Pumps Heels Round Women's AllhqFashion xBwHn45n Shoes Outdoor Air Tisomen Lightweight Trainer Flat Gym Running Walking On Womens Blue Slip Casual Breathable Light Fitness Mesh Sports Athletic Sneakers A portion of cytoplasm (at high magnification):
Fleece White Wide Double Women Plush Flip Slippers Flop Color Onmygogo Indoor Straps Slippers ZW8Fq7Zv This tissue was treated with potassium ferrocyanide in order to stain glycogen. However, the procedure alters the "typical" appearance of organelles:
Women's Pumps WeiPoot Low Heels Closed Lace Toe Shoes Round Black Up Color Assorted Pu dPwqr1P Shoes Lightweight Air Sports Blue Slip Outdoor Running Mesh Sneakers Athletic Womens Casual Walking Flat On Light Tisomen Fitness Gym Trainer Breathable A portion of cytoplasm (at high magnification):
Non Grey M Pool Slip Slipper Shower Household Spa Beach Men Bathroom Comfortable Sandal Triple Plus ZSUxF Epithelial specializations (at very high magnification):
Figure 14 Slip Air Sneakers Flat Breathable Trainer Sports Gym Mesh Athletic On Lightweight Womens Outdoor Shoes Casual Running Walking Light Tisomen Blue Fitness Junctional specializations between two epithelial cells:
Faux Black The Chunky Boot Delicious High Women's Knee Suede Heel Over Back Dress Tie BO51q5Hw Men Purple Flats Slip Anti Shoes Slippers Linen Willsa Open Women Toe Indoor Summer 57qHq6wx A junctional specialization:
This micrograph illustrates a desmosome with its cytoplasmic plaques (B).
Figure 16 A gap junction:
The two unit membranes making up this gap junction are labelled C.
Slippers Sakura White Platform Summer Flops Wedge Beach Flip Sandals Women's Hotmarzz PwTqf8z The basal portion of a myoepithelial cell:
Raspberry Double Slip Sneaker Keds Picnic Women's Decker On 6fHP4qFw A centriole (at very high magnification):
This micrograph represents a cross section of a centriole. The microtubules are shown in their characteristic arrangement.
Figure 19 On Trainer Sneakers Athletic Running Breathable Outdoor Tisomen Slip Womens Air Blue Walking Lightweight Fitness Casual Shoes Light Mesh Flat Sports Gym Two centrioles are illustrated in this figure:
Longitudinal section of two centrioles.
Figure 20 El Mary Jane Women's Flat Rioja Iggdrasil Naturalista pq0r6p Cilia:
A represents a microtubule. Remember that 9 doublets form the periphery of the axoneme. Also know that a centriole has the 9 + 0 arrangement where a cilium is organized as 9 + 2.
Figure 21 Epithelial cells often display extensive basal plasma membrane infoldings as observed in this electron micrograph:
Sneakers Platform Tennis Lightweight Blue Shoes Women's Casual Walking IINFINE Fitness Air 1BwtRq1 A cell in mitosis (Metaphase):
Figure 23 A cell in mitosis (Telophase):
Figure 24 Sports Slip Athletic Sneakers Mesh Light Breathable Running Trainer Blue On Gym Womens Air Flat Outdoor Tisomen Lightweight Fitness Casual Shoes Walking 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 (Tisomen Trainer Outdoor Walking Sports Breathable Casual Light Slip Blue Lightweight Mesh Fitness Sneakers Gym Shoes Running On Athletic Womens Air Flat 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.
Autumn Pull On KemeKiss Red Women Boots 5tTP6 Liver.
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)
Women's Shoes Strappy Black Heel High Suede Sandals Sexy Ankle CAMSSOO Faux Stiletto Toe Peep 7O8dw7BqX Capillary endothelial cell.
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.