Normal Histology | Histology Image Gallery
Prostate
Mon 11 May 2009 10:57:38 PM EDTThe prostate gland is found just below the bladder and forms the secretions of semen. The prostate is an exocrine gland which have open into the prostatic ducts and eventually to the urethra. The prostate glands are surrounded by myoepithelial cells and smooth muscle fibers. The prostate can be divided into the central glandular zone and the peripheral glandular zone.
Skin
Mon 11 May 2009 10:58:11 PM EDTThe skin is the largest organ in the body and in addition to being an immune system and also the body's defense barrier, it produces vitamin D. The epidermis is stratified squamous keratinizing epithelium, with the stratum corneum at the top consisting of cells without any organelles. Next is the stratum lucidum, then the stratum granulosum which is the water-proof region of the skin. The majority is the stratum spinosum, with the stratum germinativum at the body with the replicating cells. The dermis consists of appendages and connective tissue.
Stain
Mon 11 May 2009 10:59:49 PM EDTPicture gallery on the different stains used in histology and the appearance of tissue with these stains. Some stains actually reveal pathology. Congo red for amyloidosis; crystal violet blue for Helicobacter pylori; gram stain for bacteria; grimelius stain for fungus; hps stain for connective tissue; pas for fungi; trichrome for atherosclerosis, cirrhosis and connective tissue; and a zn (Ziehl-Neelsen stain) stain for tuberculosis and mycobacteria.
Stomach
Mon 11 May 2009 11:00:31 PM EDTThe stomach consists of four sections: the cardia, fundus, corpus and the pylorus (antrum). Histologically, there is a mucosa, epithelium, with a lamina propria and muscularis mucosae. The submucosa is a fibrous connective tissue layer containing the Meissner's plexus. The muscularis externa consists of smooth muscle bundles oriented in three layers, an inner oblique layer, middle circular layer and an outer longitudinal layer. The serosa is the outer connective tissue layer, continuous with the peritoneum.
Testis
Mon 11 May 2009 11:01:00 PM EDTThe testis is a male reproductive organ which synthesizes both hormones, testosterone, as well as forming and maturing sperm. The testis has two main primary cell types, the seminiferous tubules and the interstitial cells. The seminiferous tubules contain the germ cells which develop into spermatogonia through to spermatozoon and Sertoli cells, which are the epithelium of these tubules and support the germ cells and secrete inhibin. Between the tubules are the interstitial cells, mainly the Leydig cells that produce and secrete the hormone, testosterone and other androgens.
Thyroid
Mon 11 May 2009 11:01:39 PM EDTThe thyroid gland has right, left and pyramidal lobes. There is a connective tissue capsule that sends septae into the thyroid gland. The thyroid consists of thyroid follicles, which have colloid within the center. Theses thyroid follicles are lined by a simple cuboidal to columnar epithelium. The size of follicles usual varies. Thyroglobulin, a glycoprotein is synthesized and secreted into the follicle. The thyroid gland produces thyroid hormone which contributes to the control of metabolism.
