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301 Central Nervous SystemHigher power examination of a small pyramidal cell. At this magnification the dendritic spines are easily observed. These spines are specializations that increase the surface area of dendrites. Spines are preferential sites for synaptic contact. Large neurons may receive up to 100,000 synapses via t...Brain; Central Nervous System; cortex; dendritic spines; pyramidal cellUCLA Histology
302 Central Nervous SystemAlthough the optic nerve (CN II) appears grossly as a peripheral nerve, it is actually a white matter tract of the CNS. It is surrounded by meninges: dura mater, arachnoid mater, and the pia mater. There is a subarachnoid space filled with CSF. A distinguishing feature of the optic nerve is its cent...arachnoid mater; Brain; Central Nervous System; dura mater; Eye; meninges; Optic Nerve CN II; pia materUCLA Histology
303 Ear - Ceruminous GlandsEven at this magnification, the uniform central position of the nuclei of the ceruminous glands is apparent. Also, blebs of cytoplasm are seen on the luminal surface of the cells, an indication of apocrine secretion. Blood vessels can also be found in this section. UCLA Histology Collection.Ceruminous GlandsUCLA Histology
304 ElectrocauteryThis shows the biopsy site after light electrocautery.Knowledge Weavers Dermatology
305 Seborrheic dermatitisSeborrheic dermatitis involving the beard.Knowledge Weavers Dermatology
306 Pituitary adenomaPituitary adenomaKnowledge Weavers Pathology
307 Mature cystic teratoma-torsed with adenexal structuresElements of all three germ layers are present: endoderm, mesoderm, and ectoderm. They are classified as germ cell tumors and are thought to arise through parthenogenesis. They are found in the path of migration of the germ cells from the yolk sac to the primitive gonad.PathogenesisKnowledge Weavers Human Reproduction
308 ElectrocauteryVery light electrocautery can be used to smooth any uneven edges. If using the hyfrecator model, it should be plugged into low and a setting of 30 on the older machines, or setting of 3 watts on the newer machines should be used, and a very light brush kind of stroke should be used to smooth out the...Knowledge Weavers Dermatology
309 CartilageThis is a higher power view of the Achilles tendon insertion. Fibrocartilage is considered to be a cross between hyaline cartilage and tendon (we see little tendon here). Fibrocartilage consists of coarse bundles of collagen, between which the chondrocytes usually line up in rows. UCLA Histology Col...fibrocartilage; tendonUCLA Histology
310 SpleenSpecial stains reveal the collagenous component of the spleen's capsule and trabeculae as coarse, brownish strands. Reticular fibers appear as thin, black-stained, irregular lines. In red pulp (which predominates here), there are numerous empty-looking sinusoids.red pulp; spleenUCLA Histology
311 Total placenta previa: placenta accreta in uterine specimenPlacenta accreta or percreta may be associated with placenta previa especially if the patient has had a previous cesarean section.Knowledge Weavers Human Reproduction
312 Nodular glomerulosclerosisNodular glomerulosclerosisKnowledge Weavers Pathology
313 Anaplastic carcinomaAnaplastic carcinomaKnowledge Weavers Pathology
314 OsteosarcomaOsteosarcomaKnowledge Weavers Pathology
315 Normal brainNormal brainKnowledge Weavers Pathology
316 EyeThe corneal epithelium is multi-layered and its continuously proliferating cells change their shape from columnar to squamous as they are displaced from a thick, specialized extracellular matrix called Bowman's membrane. The stromal cells are called keratocytes and they synthesize and organize the h...cornea; EyeUCLA Histology
317 Glands of GI TractIn this image you can see a portal triad containing a branch of the portal vein, a small hepatic artery, and a biliary duct embedded in collagenous connective tissue (stained blue by trichrome). Also shown are dark red hepatocytes and pinkish sinusoids. UCLA Histology Collection.gastrointestinal tract; Liver; trichromeUCLA Histology
318 SuturingThe other side of the wound is then rolled open to expose the underlying dermis, and I placed the suture in the under-portion of the dermis as far away from the wound edge as possible. I enter from the side where the wound center, and then exit away from the wound center.Knowledge Weavers Dermatology
319 Excision: suturingTwo loops are placed around the needle holder to initiate the first throw. The short end of the suture is then grasped, and the hand holding the long(needle bearing) end of the suture crosses over the hand with the needle holder.Knowledge Weavers Dermatology
320 UterusRelatively straight follicular endometrial glands. Although this slide may be labeled early follicular phase, a dark basal layer may be evident near the myometrium. In a continuous process individual slides may not present the textbook image. UCLA Histology Collection.UterusUCLA Histology
321 Excision procedureDeep dermal suture is placed as far away from the wound edge as possible. It's initiated on the non-dominant (left) side, and final exit is on the dominant (right) side as shown here.Knowledge Weavers Dermatology
322 Epithelium - UrethraThe urethra is one of the few organs which is lined by stratified columnar epithelium. It is stratified columnar because there are many cell layers, and the cells bordering the lumen are columnar. UCLA Histology Collection.stratified columnar epitheliumUCLA Histology
323 Epithelium - Small IntestineAt a very high power view of the small intestine, it is possible to see the brush border, consisting of long microvilli, found at the luminal surface. The nucleus and cytoplasm of these cells is evident. UCLA Histology Collection.UCLA Histology
324 Bone / Cartilage - Cartilage HypertrophyThis is an area of cartilage hypertrophy. To the right is the beginning of bone formation; mostly what can be seen are spicules of calcified cartilage. UCLA Histology Collection.cartilage hypertrophyUCLA Histology
325 Skeletal MuscleThis low-power cross section of a skeletal muscle illustrates that the outside of the muscle is wrapped by epimysium. The inside of the muscle is divided into fascicles or bundles which are surrounded by perimysium. The endomysium surrounds single fibers. Each layer of connective tissue is generated...skeletal muscleUCLA Histology
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