The most used tool today for examining cells, tissues and organs is optic (light) microscopy. Structure of a Neuron. Slide NP004N hippocampal region coronal section luxol blue View Virtual Slide [orientation]. Oligodendrocytes have processes that reach out to multiple axon segments, whereas the entire Schwann cell surrounds just one axon segment. There are two types of EM: transmission electron microscopy, which requires very thin sections of tissue, and scanning electron microscopy, which uses larger pieces of tissue and produces 3-dimensional images. Depending on the type of cells present (fibroblasts, osteocytes, erythrocytes) and the ECM arrangement, connective tissue can be classified as connective tissue proper or specialized connective tissue. 3. Any of those processes can function as an axon depending on the conditions at any given time. Histology (6th ed.). Despite their differences, they all have one thing in common; specialized elongated muscle cells, called muscle fibers. Type II pneumocytes are also important because they secrete surfactant which prevents the lungs from collapsing. As such, nerves do not contain neural cell bodies. Remember that the perikaryon is the metabolic support center for each neuron, so, therefore, motor neurons require much larger perikarya. Both will appear grey to the naked eye and under the microscope, due to their lack of myelin. Histology Copyright by Malgosia Wilk-Blaszczak. Deep to the gray matter of the cerebral cortex is the white matter that conveys myelinated fibers between different parts of the cortex and other regions of the CNS. Water and some other small particles, like gases and ions, can enter. Light microscopes (or optical microscopes), use a combination of visible light and lenses to create a magnified image. As cells are generally colourless, they need to be stained so that they can be easily viewed under the microscope. Myelin, however, is more than just the membrane of the glial cell. Connective tissue proper is further subdivided into loose connective tissue, mostly found in internal organs as supporting tissue stroma, and dense connective tissue, which can be regular (tendons, ligaments) or irregular (dermis of the skin, organ capsules). Why are perikarya of dorsal horn neurons smaller than those in the ventral horn? All of this is surrounded by three connective tissue membranes (meninges): dura, arachnoid and the pia mater. Most of the respiratory tract is lined by respiratory mucosa; a pseudostratified columnar ciliated epithelium with mucus producing goblet cells. The four main types of stains used in histology are empirical, histochemical, enzyme histochemical and immunohistochemical.
Bonefish Grill Carrot Lava Cake Recipe, Articles N
Bonefish Grill Carrot Lava Cake Recipe, Articles N
Share this