nervous tissue histology ppt nervous tissue histology ppt

The name glia comes from the Greek word that means glue, and was coined by the German pathologist Rudolph Virchow, who wrote in 1856: This connective substance, which is in the brain, the spinal cord, and the special sense nerves, is a kind of glue (neuroglia) in which the nervous elements are planted. Today, research into nervous tissue has shown that there are many deeper roles that these cells play. A longitudinal section of a nerve looks very different than a transverse section: In a longitudinal section of a nerve (Figure 9), the axons stain darker and are visible as purple lines. The membrane wrapped around the fascicle is called an endoneurium and is made of the loose reticular connective tissue. Here you will see the Purkinje cell bodies slide 077 View Image. Axon diameters can be as small as 1 to 20 micrometers. Secondly, the cell bodies of unipolar neurons are always found in ganglia. Any of those processes can function as an axon depending on the conditions at any given time. The proteins are then exposed to labeled artificial antibodies that bind to the protein of interest and catalyse a chemiluminescent reaction, in which light is emitted as a result of a chemical reaction allowing visualization of the protein. All of these components work together to provide movement to the body. Using the standard model of neurons, one of these processes is the axon, and the rest are dendrites. Four main groups of tissues Epithelial Connective Muscle Nervous tissue. 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. Four of them are found in the CNS and two are found in the PNS. The lymphatic system consists of a network of vessels and lymphoid organs. Reading time: 28 minutes. This accounts for the name, based on their appearance under the microscope. adipose tissue, gastrointestinal tract, cardiovascular system). As such, nerves do not contain neural cell bodies. The branch of medical science that deals with the. These bulbs are what make the connection with the target cell at the synapse. I love Anatomy. The endocrine system is a set of tissues that secrete hormones directly into the bloodstream. 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. This ground substance, also referred to as Wharthons jelly, provides insulation and protection to the blood vessels of the umbilical cord. The central axons are so thin that they appear as purple dots in the middle of the lighter-colored circles of myelin. Histologically, although there are a few exceptions, endocrine cells generally have an epithelial origin. Tissuesare classified into four basic types: epithelium, connective tissue (includes cartilage, bone and blood), muscle, and nervous tissue. Epithelium is classified by both its cellular morphology and the number of cell layers. Water and some other small particles, like gases and ions, can enter. Unipolar neurons have only one process emerging from the cell body which causes them to appear T-shaped. Bundles of myelinated axons in the brain are called tracts, while bundles of axons in the PNS are called nerves. The cerebellum consists of an outer cortex of grey matter covering an inner area of white matter, which itself surrounds a deeper layer of grey matter (called the cerebellar nuclei). Ana 211 (Histology of Nervous tissue).pptx sunday godwin obaje Read Now Download Free PDF Related Papers Cancer Registry Report 2000 2002 Robina Greaves Download Free PDF View PDF Identification of OTX2 as a Medulloblastoma Oncogene Whose Product can be Targeted by All-Trans Retinoic Acid Timothy Parrett Download Free PDF View PDF Blotting technique is a method of localizing and quantifying proteins, DNA and RNA. Let histology be a piece of cake once you learn how to examine a histology slide! Neurons are specialized cells that contain a body (soma) and one or more processes ( dendrites, axons ). This traps and removes any inhaled dust, bacteria or foregn substances. Most substances that cross the wall of a blood vessel into the CNS must do so through an active transport process. The only freely mobile joints are synovial joints, in which adjacent joint surfaces are covered with hyaline cartilage, a soft type of cartilage rich in glycoproteins, proteoglycans and type II collagen. The ventral spinal cord. - PowerPoint PPT presentation Number of Views: 793 Avg rating:3.0/5.0 Slides: 13 Provided by: RachelA156 Category: Health Information Technology & Services. Onecommonly used technique is Western blot, in which proteins are separated from one another based on molecular weight using gel electrophoresis. Histology of Nervous TissueNervous system ppt #2. Study with Quizlet and memorize flashcards containing terms like Afferent, efferent, visceral and more. Once urine is formed from the ultrafiltrate, it travels through the excretory pathway of tubes, all of which are lined by transitional epithelium with the exception of some parts of the urethra. The epidermis is a keratinized stratified squamous epithelium mostly made out of keratinocytes. Together this gives us the various types of epithelial tissues, such as simple squamous epithelium, stratified cuboidal epithelium, pseudostratified columnar epithelium and many more. Slide of tissue is followed by slide of tissue with correct answer. They are considered part of the mononuclear phagocytic system and will proliferate and become actively phagocytic in regions of injury and/or inflammation. For oligodendrocytes, the rest of the cell is separate from the myelin sheath as a cell process extends back toward the cell body. Under light microscopy, skeletal and cardiac muscles appear striated due to the parallel arrangement of their contractile filaments into repeating units called sarcomeres. EM works by emitting parallel beams of electrons onto the tissue sample. The layers of the blood-air barrier comprise of type I pneumocytes, basement membrane and endothelial cells of the capillaries. The spinal cord contains a butterfly-shaped area of grey matter surrounded by an outer layer of white matter. Epithelial cells form two important histological structures within the brain; the blood-brain barrier and the choroid plexus. Grey matter is composed mainly of unmyelinated cell bodies and dendrites, and appears grey in color. Lateral to this structure is the tail of the caudate. These vibrate to produce sound as air passes through them. Mescher, A. L. (2013). Neurons are important, but without glial support they would not be able to perform their function. Because the axon hillock represents the beginning of the axon, it is also referred to as the initial segment. Neuroglia (glial cells) (supporting cells) The function of myelin will be discussed below. Pyramidal cells and olfactory cells are two other examples of neurons named for these classifications which will be discussed later. T and B lymphocytes are born and raised in the thymus and bone marrow, respectively. Name this exception. Everything absorbed through the alimentary tract passes through the special discontinued capillaries of the liver before going anywhere else. There is a lot more to know about the female reproductive system. One oligodendrocyte will provide the myelin for multiple axon segments, either for the same axon or for separate axons. Very little can pass through by diffusion. The most common technique used is the hematoxylin and eosin (H&E) stain. Gray matter is mostly made of neuronal bodies, dendrites and glial cells whereas white matter is made primarily out of myelinated axons. They are stabilized by ligaments, flexible fibrous bands made of dense regular connective tissue. In general, where in the brain can grey matter be found? Chapter 1 The Cell Chapter 2 Epithelium Chapter 3 Connective Tissue Chapter 4 Muscle Chapter 5 Cartilage and Bone Chapter 6 Nervous Tissue Chapter 7 Peripheral Blood Chapter 8 Hematopoiesis Organ Systems Examine the layered organization of the cerebral cortex usingslide 76stained withluxol blue/cresyl violet[orientation](which stains white matter tracts and cell bodies) ortoluidine blue and eosin[orientation](TB&E, toluidine blue stains the nuclei and RER of cells whereas eosin stains membranes and axon tracts). This is the reason why people with extensive burns are in life-threatening danger. They include hair follicles, skin glands and nails. Contrast the differences in the histological appearance of a pyramidal cell versus a Purkinje cell. The edges of this loose enclosure extend toward each other, and one end tucks under the other. Some sources describe a fourth type of neuron, called an anaxonic neuron. A third type of connective tissue is embryonic (fetal) tissue, this is a type of primitive tissue present in the embryo and umbilical cord. The cytoplasm contains specialized subunits called organelles which work like little organs. Identify all four general tissue types Answer: epithelial, connective, muscular & nervous Which of the four basic types is described below: Contains free edge Lines hollow organs Anchored by basement membrane Answer:Epithelial tissue Which of the four basic types is described below: Lack blood vessels, Readily divide Cells are tightly packed White matter consists of myelinated axons. They can be classified by many different criteria. Slide 077 20XCerebellum white and grey matter H&E View Virtual Slide, Slide 077 40XCerebellum molecular layer, Purkinje cell bodies H&E View Virtual Slide, Slide 077a Cerebellum luxol blue cross View Virtual Slide. Study with Quizlet and memorize flashcards containing terms like Afferent, efferent, visceral and more. In these slides you will not be able to discern the amazing dendritic tree that extends from the Purkinje cell bodies into the molecular layer, nor will you be able to see their axons, which extend down through the granular layer into deeper parts of the cerebellum. Supporting cells dont get as much credit as neurons in popular culture; but did you know that glial cells make up at least 80% of nervous tissue? However, the endothelial cells maintain these junctions in response to signals (via foot processes) from ASTROCYTES. Want to create or adapt books like this? Diffuse lymphoid tissues and lymphatic nodules are non-encapsulated accumulations of lymphoid tissue found in locations such as the alimentary, respiratory and genitourinary tracts. 3. Both neurons and glia have fine processes projecting from the cell body, which generally cannot be resolved in the light microscope without special staining techniques. The tissue is sectioned thinly enough so that light can pass through it. Neurons are characterized by a large cell body or perikaryon containing a large, pale (active, euchromatic) nucleus with a prominentnucleolus. Later in this sequence, you will learn how the hippocampus and dentate gyrus function in what is known as the "limbic system" to integrate inputs from many parts of the nervous system into complicated behaviors such as learning, memory, and social interaction. This gives the neuron a polaritymeaning that information flows in this one direction. Mesenchyme gives rise to all types of connective tissue. It is specialized tissue found in the central nervous system and the peripheral nervous system. The projections connect at the dendrites and are so extensive that they give the microglial cell a fuzzy appearance.