These processes form secondary processes called foot processes. What cells secrete the supporting matrix of this structure? These mitochondria support active ion transport by sodium-potassium pumps on the basal plasma membrane by providing an abundant amount of ATP. The search returns a description to the keyword and an associated image if available. Three kinds of cartilage are classified according to the abundance of certain fibers and the characteristics of their matrix. The urinary bladder collects and stores urine. Access to tissue services from the Yale Pathology tissue archives. These macrophages are called dust cells. These play a role in filtration of plasma as mutations in genes that encode proteins of slit diaphragms lead to proteinuria. Macrophages are phagocytic cells that are capable of engulfing foreign antigens and remnants of dead cells. Name the layers of the filtration apparatus. The cells of the distal convoluted tubule are smaller and more lightly stained than those of the proximal convoluted tubule. It is on the lumenal side of the barrier. During this process, the number of chromosomes is halved through meiosis. The juxtaglomerular apparatus is composed of: The terminal portion of the distal tubule empties through collecting tubules into a straight collecting duct in the medullary ray. Resorption of fluid, note stereocilia on surface of epithelial cells. Reticular fibers are composed of type III collagen. This is a cross section of the epididymis. Your browser is antiquated and no longer supported on this website. This image shows a macrophage with an irregularly shaped nucleus. The ureter empties the urine into the bladder. Click here for the latest information on Yale’s COVID-19 policies and procedures. The kidney performs several important functions: The kidney performs many of the above functions by filtering blood to remove ions and small molecules and then selectively reabsorbing ions and small molecules depending on the current conditions of the body. Some fibroblasts have a contractile function; these are called myofibroblasts. Dense, irregular connective tissue also contains a large number of collagenous fibers but these are oriented in multiple directions. Juxtaglomerular cells cells are derived from smooth muscles cells of afferent arterioles. Timely high quality histology services to the Yale community and beyond. These tubes are lined by cuboidal epithelial cells that bear cilia. Macrophages descend from monocytes and are found in most organs where they have different names depending on the organ. Match each section of the renal tubule with its function: Describe the function of each of the following cell types: Describe the changes in the epithelium as urine moves from the ureter through the urethra. Portions of the medulla extend into the Mitochondria become arranged around the flagellum. These extra-testicular duct system brings the spermatozoa from the testes to the outside of the body. This system is composed of several distinct tubes: The male reproductive system contains several accessory glands that contribute to the composition of semen: The penis is composed of two types of erectile tissue: The erectile tissue of the penis appears as a vast sponge-like system of irregular vascular spaces intercalated between the arteries and veins. Female Reproductive System Access to tissue services from the Yale Pathology tissue archives. The structure of the respiratory system is basically a highly branched tube. The medulla and medullary rays contain the loops of Henle and collecting ducts. The mission of our Developmental Facility is to provide. The segments of the tube are divided into proximal convoluted tubule, loop of Henle and distal convoluted tubule. These cells are abundant in newborns and hibernating mammals, but are rare in adults. The end of the loop of Henle becomes the distal convoluted tubule near its original glomerulus. Timely high quality histology services to the Yale community and beyond. They remain connected to one another by cytoplasmic bridges. The epithelium of the ductus deferens is similar to that of the epididymis, with pseudostratified cells bearing stereocilia. The initial segment of the distal convoluted tubule lies right next to the glomerulus and forms the juxtaglomerular apparatus. The ion gradient created by these pumps in turn supports ion and water reabsorption on the apical side of the proximal convoluted tubule cells. Fibroblasts can be seen by light microscopy in type of loose connective tissue called areolar tissue. Sperm gain motility in the epididymis. This process involves several steps: The final maturation of sperm occurs in the epididymis, where the cells gain the ability to move. They primarily resist tension. Lastly, loose connective contains few collagenous fibers; instead, it contains more glycoproteins and cells. When ADH is present, the collecting duct becomes permeable to water. The plasma has to pass through a filtration barrier of three layers to enter Bowman's space: the capillary endothelium, the podocyte layer, and their fused basement membrane. Nephrons begin in the cortex; the tubules dip down to the medulla, then return to the cortex before draining into the collecting duct. The urethra carries the urine away from the bladder to the outside of the body. Why might one want a transitional epithelium in this region?

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