Histology

• Elastic artery can be observed in the Spermatic cord using H&E stain.
• Collagen fibers are observed in the colon using H&E and azan stains.
• Reticular fibers can be observed in the Large Intestine using H&E stain.
• Secretory cells in glands which use apocrine secretory mechanism are polymorphic, meaning the synthesis of the substance inside the secretory cells is continuous but the release is not.
• Apocrine/Smell gland releases its secretum onto the surface of the skin (exocrine), and the secretory product which is emptied onto the surface of the skin is a good nourishing material for bacteria which naturally lives on the surface of our skin.
• During apocrine release of the secretory product, some cytoplasm of the secretory cells is also lost, not just the secretum.
• Secretory cells are not secretory cells, and they are surrounded by the basement membrane which surrounds the secretory unit.
• Secretory cells around the lumen are taller than secretory cells after release.
• Melanocytes in skin synthesize melanin, which has a natural brown color.
• Myoepithelial cells are also known as Epithelioid cells, which are epithelial cells modified to acquire strong contractile features.
• Melanocytes, which create melanin, are exclusively in stratum basale.
• Brown color in more apical cell rows of the epithelium despite melanocytes absence can be explained by processes of melanocytes extending toward more apical cell rows and processes of keratinocytes phagocytose these processes with melanin content.
• Keratinocytes can phagocytose processes of melanocytes together with melanin content through a process called cytocrin secretion.
• Keratinocytes cannot synthesize melanin, the only way melanin occurs inside the keratinocytes is if they got it from melanocytes.
• Secretory cells are surrounded by myoepithelial cells, and the secretory product which is emptied onto the surface of the skin is a good nourishing material for bacteria which naturally lives on the surface of our skin.
• Myoepithelial cells are contractile cells with processes which surround the secretory cells, and when they contract it can help reduce secretum by squeezing it out of the secretory cells.
• Van Gieson stain is used to reveal elastic fibers appearing in dark color.
• Ductus deferens is observed in the tissue.
• Collagen fibers are observed in the tissue.
• Epithelium nuclei are observed in the tissue.
• Adipose tissue cells are empty since the lipids were washed out during fixation.
• Red blood cells are observed in the tissue.
• Blood vessels are observed in the tissue.
• Smooth muscle cells are observed in the tissue.
• Muscle cells are observed in the tissue.
• Elastic fibers are observed in the tissue.
• Adipose tissue is observed in the tissue.
• Blood vessel wall is observed in the tissue.
• The functions of saliva include moistening dry foods to aid swallowing, dissolving and suspending food materials that chemically stimulate taste buds, buffering the contents of the oral cavity through its high concentration of bicarbonate ion, digestion of carbohydrates by the digestive enzyme α-amylase, and controlling the bacterial flora of the oral cavity because of the presence of the antibacterial enzyme lysozyme.
• Saliva is a source of calcium and phosphate ions essential for normal tooth development and maintenance.
• Saliva includes the combined secretions of all the major and minor salivary glands.
• Cells in the CT are PAS positive due to glycogen content.
• The mesenchyme is occupied by mesenchyme cells which have a similar look to fibroblast, and can be seen with a nucleus, basophilic cytoplasm, and several processes coming from the cells.
• The cytoplasm in the CT contains mucus.
• The ducts in the CT produce mucus products.
• In the ground substances, we can find large amount of hyaluronic acid, a polar molecule that can keep large amounts of water within the ground substance of the CT.
• The gland in the CT is dominated by mucus secretory units.
• The nuclei in the CT are stained by Hematoxylin and pushed to the basal surface.
• Mucus in the CT contains large amount of glycoproteins and carbohydrate side chains.
• Saliva also contains antibodies, notably salivary sIgA.