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151 Eye - Optic NerveHigh power view of part of the optic nerve. The central blood vessels are shown as well as the meningeal coverings of the nerve. UCLA Histology Collection.UCLA Histology
152 Skin - NailMedium power view of the nail including views of the nail root, nail fold of skin and the eponychium. UCLA Histology Collection.UCLA Histology
153 Adenocarcinoma, colonAdenocarcinoma, colonKnowledge Weavers Pathology
154 BreastAlveoli of a lactating breast. The apical surface of the simple cuboidal cells is filled with lipid droplets which may be secreted from the cell. Other cells release the protein component of the breast milk. Each alveolus is invested within a basal lamina which contains a number of slender myoepithe...Breast; lactating breastUCLA Histology
155 Male reproductive system - Ductus EpididymisThe wall of the ductus epididymis is pseudostratified epithelium with stereocilia. These cellular extensions are involved in resorption of luminal fluid. The principal cells have elongated nuclei, and the basal cells have round nuclei. The wall of the epididymis is composed of circularly arranged sm...Male reproductive systemUCLA Histology
156 Circulatory System - VeinsWalls of large veins have the same three tunics described for arteries, but the tunics are less distinct, and the elastic and muscular components are less developed. Note the lumen, tunica intima, tunica media, and tunica adventitia. The tunica adventitia is the thickest of the three coats, containi...Circulatory System; tunica adventitiaUCLA Histology
157 SpleenThis image shows the thin splenic capsule overlying the red pulp. The red pulp contains many macrophages, here stained black by phagocytized carbon. The white pulp appears as round lymphocytic nodules. Between the white pulp and the red pulp is the marginal zone. UCLA Histology Collection.red pulp; spleen; splenic capsule; white pulpUCLA Histology
158 Gastrointestinal Tract - Mucosa of the ColonThis image illustrates the thick protective mucosa of the colon. Identify the muscularis mucosae and the lamina propria. The epithelium is composed of deep crypts of Lieberkuhn, many mucous secreting goblet cells, and only a few absorptive cells. UCLA Histology Collection.UCLA Histology
159 KidneyPresent here in the kidney medulla are sections of straight distal tubules (low cuboidal walls), straight proximal tubules (tall cuboidal walls), and vasa recta (lined by endothelium). UCLA Histology Collection.Kidney; medulla; straight distal tubules; straight proximal tubules; vasa rectaUCLA Histology
160 BreastNote the numerous glands of the nipple located within the dermis. Be sure to identify the epidermis marked with numerous dermal papillae. UCLA Histology Collection.Breast; female nippleUCLA Histology
161 Urinary systemThe urethra is surrounded by several layers of striated muscle: also known as the external sphincter. UCLA Histology Collection.Urethra; Urinary SystemUCLA Histology
162 Medullary carcinomaMedullary carcinomaKnowledge Weavers Pathology
163 SuturingI exit through the other side of the wound as superficially and closely as possible to the wound edge. Generally, I am about a mm away from the wound edge, and just barely entering the dermis. It is crucial to be as superficial within the dermis and as close to the wound edge on the second pass as i...Knowledge Weavers Dermatology
164 Peripheral Nervous SystemThis cross section of a peripheral nerve bundle shows black-stained myelin sheaths encasing axons. These myelinated axons are in turn surrounded by endoneurium. The nerve fascicles are surrounded by perineurial septa. Note the vein and connective tissue in the upper right hand corner of this image. ...endoneurium; myelin sheaths; Peripheral Nervous SystemUCLA Histology
165 Gastrointestinal Tract - Circumvallate PapillaThis is a high magnification view of the lateral aspect of the circumvallate papilla. Identify two taste buds (oval structures) which are paler than the surrounding stratified squamous epithelium. At the top of each taste bud is a taste pore which allows for detection of dissolved food constituents....UCLA Histology
166 Bone / CartilageThere is articular cartilage on each side of the joint space. Bone is stained pink. Find the synovial fold that generates the synovial fluid which lubricates the joint. Also find bone marrow spaces and the epiphyseal growth plate. UCLA Histology Collection.articular cartilage; bone; epiphyseal growth plateUCLA Histology
167 NecrosisThe purple/red area on the heel is an area of necrosis of the entire epidermis and dermis that is induced by the person lying in one position for too long. Again, the entire epidermis and dermis are necrotic, and need to be surgically removed.Knowledge Weavers Dermatology
168 Gastrointestinal Tract - Decalcified Tooth and GingivaThis image of the decalcified tooth shows the attachment of the gingiva (gum) to the dentin. Gingiva is masticatory mucosa; it is composed of lamina propria (dense CT) and parakeratinized stratified squamous epithelium. The wedge of empty space was formerly occupied by the tooth`s enamel. UCLA Histo...UCLA Histology
169 PituitaryThe pituitary stalk consists of the pars tuberalis (with RBC-filled portal vessels) and the neural stalk (the axons of the hypothalamo - hypophyseal tract). Both the pars tuberalis and the pars nervosa transport hormonal factors; can you name these hormones? UCLA Histology Collection.Pituitary; pituitary stalkUCLA Histology
170 Urinary systemThis section is of an extended bladder. The surface layer of the transitional epithelium is squamous in nature. The lamina propria is highly vascularized and contains many lymphocytes. UCLA Histology Collection.Urinary Bladder; Urinary system; bladderUCLA Histology
171 Excision: suturingThe needle holder is then placed inside the long arm of the V, and a single loop is thrown around the needle holder. The short arm of the suture is then grasped.Knowledge Weavers Dermatology
172 SkinLongitudinal section of two hair follicles. The hair bulb is composed of the hair root and the invaginating dermal papilla. The cells in the hair root are the matrix. As the hair grows the matrix cells become differentiated into the inner medulla and outer cortex. External to the cortex is the inter...hair follicles; SkinUCLA Histology
173 Male reproductive systemHigher power magnification of the transition from seminiferous tubule (lined with Sertoli cells, spermatogonia, spermatocytes, and spermatids) to the tubuli recti (lined with Sertoli cells) to the rete testis (lined with simple columnar cells). Note the dense, collagenous, connective tissue of the m...male reproductive system; Seminiferous tubule; testisUCLA Histology
174 PituitaryThis image shows an unusually large hypophyseal cyst surrounded by a shrinkage artifact and invading basophils from the former region of the pars intermedia which are now within the pars nervosa. A higher magnification of this region is found in image 166-40-2. UCLA Histology Collection.PituitaryUCLA Histology
175 Skeletal MuscleNote the highly variable shape of these muscle fibers cut in cross section. Identify the peripherally located myonuclei, endomysium, and capillaries in this section. Note the septa of perimysium between muscle fascicles. UCLA Histology Collection.endomysium; perimysium; skeletal muscleUCLA Histology
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