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1 Gastrointestinal TractLow power view of a plica circularis of the jejunum; this is a fold of mucosa and submucosa. Many poorly preserved villi, evaginations of lamina propria and epithelium, can be seen protruding from the plica circularis. Invaginations of the epithelium into the lamina propria form intestinal glands ca...gastrointestinal tract; plica circularis; small intestineUCLA Histology
2 Eye - LensThe shape of the lens changes during the process of accommodation. When the eye focuses on an image while reading, the smooth muscle of the circular ciliary body contracts, reducing tension on the zonular fibers (collectively called the suspensory ligament), causing the lens to bulge, increasing its...canal of SchlemmUCLA Histology
3 Central Nervous SystemGolgi impregnation reveals the cell body and the apical and basal dendrites of a pyramidal cell. This cell derives its name from the shape of its cell body. The apical dendrite is a short tapering process with numerous small dendritic spines, and is directed towards the surface of the cortex. The ba...Golgi impregnation; pyramidal cell; Brain; Central Nervous SystemUCLA Histology
4 Cardiac MuscleLocate and identify a number of anastamosing branches, central nuclei, and intercalated disks in this section of cardiocytes. Also note the abundant connective tissue spaces between cardiocytes. These areas contain many capillaries, providing the cardiocytes with an excellent vascular supply. UCLA H...Cardiac Muscle; HeartUCLA Histology
5 Lymph NodesThis image from the parenchyma of the lymph node shows phagocytic macrophages crammed with carbon. Few lymphocytes are visible. The connective tissue stroma contains reticular fibers, fibroblasts, and reticular cells. UCLA Histology Collection.Lymph Node; lymphocytes; macrophageUCLA Histology
6 Epithelium - CorneaOn the outer surface of the cornea, there are many cell layers; therefore it is stratified. Because the outermost layer of cells is flattened, these are termed squamous. Hence this is called stratified squamous epithelium. UCLA Histology Collection.stratified squamous epitheliumUCLA Histology
7 SkinModerate power view of the base of a hair follicle in skin. Good view of the dermal papilla and other coverings of the hair follicle bulb. UCLA Histology Collection.SkinUCLA Histology
8 EarThe thin skin of the external ear canal with hair follicles. Note the presence of the cartilage of the auricle. UCLA Histology Collection.Ear; External Ear CanalUCLA Histology
9 BreastThe male nipple has a rudimentary duct system. The epidermis is thin with enlarged dermal papillae. The bundles of smooth muscle found within the dermis allow the nipple to become erect. In female this response facilitates feeding. The lactiferous duct lined by a cubiodal epithelium, arise from the ...Breast; male nippleUCLA Histology
10 Glands of GI TractThis images illustrates a section of the liver stained with PAS to visualize the glycogen storage in hepatocytes. Hepatocytes have granules in their cytoplasm due to the presence of stored glycogen. Shown here are also sinusoids and a central vein. UCLA Histology Collection.gastrointestinal tract; glycogen; Liver; pas stainUCLA Histology
11 Gastrointestinal TractThis image shows finger-like villi (made up of epithelium and lamina propria), the crypts of Lieberkuhn (invaginations of the epithelium), and the muscularis mucosae. To the left of the muscularis mucosae is the submucosa of the plica circularis. UCLA Histology Collection.crypts of Lieberkuhn; gastrointestinal tract; small intestineUCLA Histology
12 UterusThe luminal surface of the secretory endometrial glands is irregular because of its secretory products. The stromal cells are nondescript but remember that they become decidual cells after implantation of the embryo. Contrast these endometrial glands with image 222-10-1. UCLA Histology Collection.secretory endometrium; UterusUCLA Histology
13 PituitaryRelatively low power view of the pars distalis abutting against the pars nervosa. There are some hypophyseal cysts shown. UCLA Histology Collection.PituitaryUCLA Histology
14 OviductEpithelium of the ampulla of the oviduct. The epithelium is similar to that of the isthmus although ciliated cells may be more abundant. Basically there are light and dark cells, ciliated and/or secretory cells. Again, note the folded epithelium and how it forms a labyrinthine lumen. UCLA Histology ...OviductUCLA Histology
15 Epithelium - TestisThe epithelium of a seminiferous tube showing the various stages of spermatogenesis. UCLA Histology Collection.UCLA Histology
16 Circulatory SystemThe internal elastic membrane (IEM), a component of the tunica intima, separates the tunica intima from tunica media. The lumen of blood vessels (including the heart) is lined by simple squamous endothelium. The nuclei of the endothelium are visible here. Identify the sheet-like laminae of elastic f...Aorta; Circulatory System; endothelium; tunica intima; tunica mediaUCLA Histology
17 Skeletal MuscleMuscle spindles are special sensory organs that are arranged in parallel with the wider extra fusal muscle fibers. In this image of a muscle spindle, identify the capsule (1, 2, 3, 4, 5) which surrounds the muscle spindles. The different sizes reflect multiple spindles aligned serially lengthwise. I...muscle spindleUCLA Histology
18 thyroidLow magnification of the thyroid. This image consists of numerous follicles of varying size, but at this power the epithelium cannot be distinguished. Note that a tangential section of a large follicle may make it appear small. In this case however, there isn`t room for all these follicles to be tan...ThyroidUCLA Histology
19 SpleenNote the mesothelium of the visceral peritoneum covering the splenic capsule. Some of the pink streaks among the blue-stained collagen fibers in the capsule and trabeculae are elastin fibers and a few smooth muscle fibers may be present. Sinusoids are present in the red pulp. UCLA Histology Collecti...red pulp; spleen; trichrome; visceral peritoneumUCLA Histology
20 OviductThe isthmus of the oviduct is a muscular tube with a relatively small lumen. The epithelium, which is shown under high magnification in image 217-40-10, is not thrown into folds. The oviduct contains layers of longitudinally and circularly arranged smooth muscle. UCLA Histology Collection.fallopian tube; isthmus; OviductUCLA Histology
21 Glands of GI TractHigher magnification of the gallbladder mucosa illustrating the tall cells of the simple columnar epithelium and collagen fibers within the lamina propria. UCLA Histology Collection.Gall bladder; gastrointestinal tractUCLA Histology
22 Adrenal - Adrenal MedullaThis high magnification view of the adrenal medulla shows its general lact of organization compared to that of the cortex. A ganglion cell complete with satellite cells is indicated. UCLA Histology Collection.UCLA Histology
23 UterusUnder the action of progesterone the endometrium hypertrophies and the endometrial glands begin secretory activity. A coiled artery is evident near the basal layer. UCLA Histology Collection.endometrium; UterusUCLA Histology
24 SkinEccrine sweat glands are not associated with hair follicles. Their ducts open independently on the surface and are composed of stratified cuboidal cells (usually 2 layers). These sweat glands are simple coiled tubular glands. The secretory portion is composed of low columnar to cuboidal cells deep i...Eccrine sweat glands; SkinUCLA Histology
25 Epithelium - Sweat GlandThe epidermis of the skin consists of stratified squamous epithelium; the outermost region is in the process of sloughing off keratin. Below, within the connective tissue, are found sweat glands. Coiled sweat ducts can be seen coursing through the epidermis. UCLA Histology Collection.stratified squamous epitheliumUCLA Histology
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