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1 Eye - Rods and ConesRod and cone photoreceptors have their cell bodies in the outer nuclear layer. Between these cell bodies and the retinal pigment epithelium are the photoreceptor inner segments (where proteins are synthesized) and the outer segments (the light sensitive portion). The inner segments of cones are cone...UCLA Histology
2 UterusThis relatively brief phase of the endometrial cycle consists of shrinkage of the endometrium and intraendometrial hemorrhage and fragmentation. The myometrium is located to the left. A higher magnification of the ischaemic endometrium is shown in image 226-10-1. UCLA Histology Collection.ischaemic endometrium; UterusUCLA Histology
3 KidneyIn this section through the renal papilla, identify the terminal collecting tubules (lined by columnar epithelium). Also note a straight segment of the loop of Henle, many thin loops of Henle, and cross-sections of the vasa recta. UCLA Histology Collection.Kidney; renal papilla; terminal collecting tubulesUCLA Histology
4 BreastThis active, lactating breast contains a large number of lobules of tightly packed alveoli. The connective tissue of the interlobular elements is highly compressed. Note the lactating glands, the excretory duct and some fat. UCLA Histology Collection.Breast; lactating breastUCLA Histology
5 Bone - Haversian SystemHaversian systems can be seen well in this image of dried compact bone. Haversian or central canals and concentrically arranged osteocytes are also visible. UCLA Histology Collection.UCLA Histology
6 SkinHealing skin (rat). See lymphocyte infiltration. UCLA Histology Collection.SkinUCLA Histology
7 Eye - RetinaThe retina consists of the retinal pigment epithelium and neurosensory retina. The neurosensory retina includes multiple layers of neurons and some glia. The outer nuclear layer contains the cell bodies of rod and cone photoreceptors. The inner nuclear layer contains the cell bodies of multiple neur...UCLA Histology
8 OvaryThis tissue looks like a dying corpus luteum, but that is a rare event. This is an example of a structure that we cannot identify unless we see a zona pellucida and/or a glassy membrane. If you had a section along the plane labelled A you would not be able to differentiate between a section through ...OvaryUCLA Histology
9 EarAt this higher magnification, one can differentiate the hair & supporting cells, the gelatinous cupula, and the dark cells which mark the transition of the membranous labyrinth into the crista ampullaris. Bone is also evident. Movement of the endolymph against the cupula causes bending of hair cell ...Crista Ampullaris; EarUCLA Histology
10 Peripheral Nervous SystemThis slide of myelinated nerves is stained with osmium to demonstrate the myelin sheaths. The region where two myelin sheaths covering the same axon contact one another is the Node of Ranvier. The region of myelin sheath between these nodes is known as the internode. UCLA Histology Collection.myelin sheaths; osmium; Peripheral Nervous SystemUCLA Histology
11 Epithelium - CorneaThe cornea of the eye is lined by simple squamous epithelium on its inner surface and stratified squamous epithelium on its outer surface. The stroma of the cornea consists of regularly arranged collagen fibers. UCLA Histology Collection.simple squamous epithelium; stratified squamous epitheliumUCLA Histology
12 Cells / Organelles - PituitaryCells of the pituitary gland containing cytoplasmic secretory granules. The red-orange granules and the blue-purple granules contain different hormones. UCLA Histology Collection.pars distalis; secretory granulesUCLA Histology
13 OvaryA typical preantral follicle possessing a zona pellucida , multilayered granulosa or follicular cells and a stromal derived theca again embedded in stroma. Be sure you realize that the components within the zona pellucida are the nucleus of the ovum and its cytoplasm. UCLA Histology Collection.Ovary; preantral follicleUCLA Histology
14 lymphoid tissueThis image shows stratified squamous epithelium overlying connective tissue. The parenchyma contains many lymphoid nodules. Crypts are present where epithelium invaginates into parenchyma. UCLA Histology Collection.lymphoid nodule; lymphoid tissue; palatine tissue; palatine tonsilUCLA Histology
15 Cells / Organelles - LiverAt a higher magnification, liver cell nuclei can be seen to have nucleoli. Note the heterochromatinheterochromatin lining the internal portion of the nuclear envelope. UCLA Histology Collection.Cells and Organelles; NucleusUCLA Histology
16 Eye - Lens FibersLens fibers elongating as they move posterior. UCLA Histology Collection.UCLA Histology
17 Peripheral Nervous System / Central Nervous SystemThe relationship between the spinal cord, the spinal roots, and the meninges is illustrated here. The surface of the spinal cord is covered by pia mater. Between the pia mater and web-like arachnoid mater is the subarachnoid space which contains CSF. The thick, collagenous dura mater is continuous w...arachnoid mater; Central Nervous System; dura mater; meninges; Peripheral Nervous System; pia mater; spinal cord; spinal rootsUCLA Histology
18 Peripheral Nervous SystemThis cross sectioned peripheral nerve demonstrates the relatively thick myelin covering of axons, as well as the endoneurium which is located between the myelin sheaths. Also note the blue-stained collagen of the epineurium and a small blood vessel. UCLA Histology Collection.axons; endoneurium; myelin; Peripheral Nervous SystemUCLA Histology
19 PlacentaThis image presents the basic organization of the placenta. Embedded within the maternal blood space are numerous fetal villi, some of them clearly tertiary villi , all lined by the syncytiotrophoblast . The only things missing in this image are maternal decidual cells and fetal/maternal fibrinoid. ...PlacentaUCLA Histology
20 Epithelium - Lymphoid TissueCrypts of the palatine tonsils are lined by stratified squamous epithelium. The lymphoid tissue can be seen organized in nodules. A connective tissue capsule partially surrounds the tonsil. Note the skeletal muscle which is associated with the palatine tonsil. UCLA Histology Collection.palatine tonsilUCLA Histology
21 KidneyThe renal papilla is the site where terminal collecting ducts empty urine into the U-shaped minor calyx. The lumen of the minor calyx is lined by transitional epithelium. Strands of circular smooth muscle are found in the wall of the minor calyx. UCLA Histology Collection.Kidney; minor calyx; renal papilla; terminal collecting ductsUCLA Histology
22 Eye - Lens EpitheliumThis enlargement of slide 236-2.5-2 reveals the lens epithelium in various phases: the anterior epithelium, area of proliferation, and area of elongation. The lens bow region consists of lens fiber nuclei in various stages of degeneration. UCLA Histology Collection.UCLA Histology
23 Thymus - Hassall's CorpuscleThis image shows an early and a late Hassall's corpuscle. Also visible are numerous epithelial reticular cells and even more numerous lymphocytes. UCLA Histology Collection.epithelial reticular; Hassall's corpuscleUCLA Histology
24 Circulatory System - Brachial Artery and VeinThis image shows the brachial artery (a muscular artery) at lower left, and the brachial vein at right. The staining of elastic fibers demonstrates the dark internal elastic membrane (IEM) and external elastic membrane (EEM), sandwiching the tunica media. The arterial intima appears to have sloughed...brachial vein; tunica adventitiaUCLA Histology
25 Respiratory SystemBronchus-associated lymphoid tissue BALT consists of submucosal lymphoid tissue in intermediate and small airways. They are part of the diffuse mucosa-associated lymphoid tissue (MALT) also found in many other tissues. These structures are normal, but similar collections in lung alveolar tissue are ...Lung; lymphoid tissue; Respiratory SystemUCLA Histology
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