Nerve tissue as in the brain, spinal cord and peripheral nerves that branch throughout the body are all made up of specialised nerve cells called neurons. This book is designed for undergraduate medical and dental students. Nerve is a cordlike organ that is part of peripheral nervous system. An axon is the long stemlike part of the cell that sends action potentials to the next cell. Cell body nerve fiber is a general term for any neural process extension that emerges from the cell body of a neuron and it consists of an axon and myelin sheath if present in the nervous system there are nerve fibers in cns and pns it may be myelinated andor unmyelinated in cns it is made up of many nerve cell fibers bound. Nervous tissue the most complex of the four basic tissues, is composed of nerve cells, the neurons and supporting.
This is a section of the spinal cord revealing the cell body of one of the large alpha motor neurons. The other type of cell is neuroglia, or glial, cell. For staining microglia, fibroglia, fibrin and coarse fibrils. The afferent or sensory neurons conduct nerve impulses from the sense organs and receptors to the central nervous. Cells in both central and peripheral nerve tissue are of two kinds. Nervous tissue consists of two main types of cells. Nerve vary in size, but every nerve consist of parallel bundles peripheral axons.
List the sequence of events in a simple sensory receptormotor response pathway. The cell body contains the nucleus and other cellular organelles. Peripheral nervous system pns, composed of the cranial, spinal, and peripheral nerves conducting impulses to and from the cns sensory and motor nerves. I have gathered together histology practice quizzes from various online classes for college, online medical classes, online histology courses, and other online medical training programs. If you continue browsing the site, you agree to the use of cookies on this website. Nerve tissue as in the brain, spinal cord and peripheral nerves that branch throughout the body are all. Identify the tissue type and a location where it is found. Peripheral nerves can be found in the brain cortex. What links here related changes upload file special pages permanent link page information wikidata item cite. Histology of neuron principle cells of nervous tissue consist of 3 parts. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Cell body perikaryonsoma a single axon multiple dendrites07122012 3. Connective tissue of the blood vessels of the nervous tissue. A collateral axon or an axon collateral is a branch off of the main axon that usually feeds back onto the soma. Pdf neuroanatomy and histology of the central nervous system. The following questions are designed for introductory drill. They are responsible for sensing stimuli and transmitting signals to and from different parts of an organism. Previous quiz connective tissue next introduction to tissues. Support cells support cells in the central nervous system cns are grouped together as neuroglia neuroglia literally means nerve glue the function of neuroglia is to support, insulate, and protect the delicate neurons of the brain types of neuroglia in cns astrocytes starshaped cells half of all brain tissue.
Neuroglia and neuron link to more detailed screens. Nervous tissue is specialised to react to stimuli and to conduct impulses to various organs in the body which bring about a response to the stimulus. Neurons are the basic structural unit of the nervous system. They are electrically active and release chemical signals to target cells. Monitoring changes in internal and external environment stimuli. Nerve cells are highly specialized to react to stimuli and conduct the excitation from one region of the body to another.
Functions of nerve tissue nervous tissue allows an organism to sense stimuli in both the internal and external environment. Bundles of axons make up the nerves in the pns and tracts in the cns functions of the nervous system are sensory input integration, control of muscles and glands, homeostasis, and mental activity. They are responsible for the computation and communication that the nervous system provides. The histology of the nervous tissue reveals neurons and neuroglia that propagate nerve impulse to internal and external stimuli. Nervous tissue, also called neural tissue, is the main tissue component of the nervous system. Neurons are the primary type of cell that most anyone associates with the nervous system. Like cns, but unlike other nonenteric autonomic ganglia, these enteric ganglia exclude connective tissue, and. Note the initial portions of the dendrites and axon that arise from the neuronal body. Click on the sound icon for the audio file mp3 format for each slide. The structure and function of nervous tissue v2 1st edition. It investigates the plasticity of synapses, their degeneration and regeneration, neuronal inclusions, rna of nervous tissue, and molecular organization of neural information processing. A neuron is a basic structural unit of the nervous system containing a cell body, dendrites, and an axon. Pdf a detailed anatomy and histological structure of the brain and spinal cord, referring to the central nervous system and special sensory.
Peripheral nervous system pns all nerves emergingarriving to cns nervous tissue cellularity. Click here to add histologyworld web histology quizzes to your favorites so that you can take a histology practice quiz throughout your histology class. Intro to the nervous system tissue and physiology nervous system. Muscle and nervous tissue quiz yakima valley college. Neurons soma processes dendrites axon axon hillock terminal arborization sinaptic buttons. Nervous tissue is the primary tissue that composes the central nervous system and the peripheral nervous system. The human nervous system consists of the central nervous system cns and the peripheral nervous system pns. Scribd is the worlds largest social reading and publishing site. Loose areolar connective tissue papillary layer of dermis hypodermis around organs basement membrane of mucous membranes surrounding blood vessels blood vessel.
Scattered around the neuron are many neuroglial cells, which in addition to neurons are the. The neural tissue in general develops from the ectoderm of the embryo, but the microgliocytes to be described ahead arise from the mesoderm of the embryo. Prepared staining kits for histology and pathology j. Each cell consists of the following parts see figure 1. Pns, peripheral nervous system all other neural tissue, nerves, receptors, neuroglia. The nervous system regulates and controls bodily functions and activity and consists of two parts. Transmit messages nerve impulses from one part of the body to another. Cell body nerve fiber is a general term for any neural process extension that emerges from the cell body of a neuron and it consists of an axon and myelin sheath if present in the nervous system there are nerve fibers in cns and pns it may be myelinated andor unmyelinated in cns it is made up of many nerve cell fibers bound together b y connective tissue, it has 3 parts. Unmyelinated nerve fibers cannot be found in the peripheral nerves. Histology and virtual microscopy learning resource.
The present updated edition is an illustrated account of microscopic structures of tissues and organs in a simple and precise. In nervous tissue, the collateral branch of axon arise from mylienated or unmyleinated nerve fibres or from both and what is the function of it. Lectures will provide you with an outline of the topic, but you are expected to supplement the information with private study. Like other parts of the peripheral nervous system, these ganglia are covered by a thin connective tissue layer, essentially a perineurium. A bundle of neuron processes wrapped in connective tissue wrappings. Textbook of histology a practical guide jp gunasegaran pdf. Blood now, without any further painstaking ado, we will move on to the main part. The nervous tissue is an assemblage of cells and supportive elements materials in which there is a predominance of cells which are highly specialized in the property of excitability and conductivity, whereby they are capable of generating and conducting electrochemical wave along their plasma membrane. Nervous tissue makes up one of the four basic tissue types. Having looked at the components of nervous tissue, and the basic anatomy of the. Chapter 11 lecture a histology of nervous tissue youtube. The cell membrane of these muscle fibers is known as sarcolemma.
Ssb histology nervous tissue saq siu school of medicine. Histology of nervous tissue slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Distinguish the major functions of the nervous system. Study histology of nervous tissue flashcards at proprofs ex. They do not necessarily represent the quality of questions which will appear on the unit evaluation. Connective tissue sheath of the peripheral nerves, which include see diagram 1. The cellular unit of the nervous system is the neuron.
Nervous system is divided anatomically into two major components. The basic functional unit of the nervous system is the neuron. Nervous tissue integrates and coordinates the activities of the bodys cells and organs through conduction of electrical impulses and secretion of chemical neurotransmitters. Campbell siuc anthropology student for some question sets. The structure and function of nervous tissue, volume iv. Histology of nervous tissue neuroglia neurons myelination nervous tissue. Nervous tissue general characteristics and functions of nervous tissue composed of neurons and neuroglial cells main function is to transmit and process information divided into two major components o central nervous system. Surrounds all of the neuron processes contributing to a nerve. The cytoplasm of these muscle fibers is known as sarcoplasm. Connective tissue proper of the nervous tissue which include. Nervous tissue is made up of different types of neurons, all of which have an axon. The connective tissue coat that covers each individual peripheral nerve is called perineurium.
Although the nervous system is very complex, there are only two main types of cells in nerve tissue. Peripheral nervous system pnsall cranial and spinal nerves and their associated roots and ganglia functional pns divisions. Nervous tissue is a part of the vertebrate tissue that protects the nervous system. By following this topic, you will find out about the basic structure of nerves, synapses, central and peripheral nervous systems, and supporting cells found in nervous tissue. The human nervous system contains more than 10 billion neurons that vary considerably in size and shape. It is the conducting cell that transmits impulses and the structural unit of the nervous system. Use the virtual microscope or other histology sites for images of nerve tissue. Muscle and nervous tissue muscle tissue general characteristics of muscle elongated cells in direction of contraction appearance depends on direction of cut longitudinal or cross section general functions of muscle contracts in response to a stimulus to generate movement o movement of one part with respect to another. Prepared staining kits for histology and pathology emsdiasum. Mp3 files, with questions and answers read aloud, have been recorded by m. Nervous tissue is composed of two types of cells, neurons and glial cells. Neurological tissue stains method for supporting elements ptah method for central nervous tissue.
Support cells support cells in the central nervous system cns are grouped together as neuroglia neuroglia literally means nerve glue the function of neuroglia is to support, insulate, and protect the delicate neurons of the brain types of neuroglia in cns astrocytes starshaped cells half of all. Physiology ii and biochemistry ii focuses on the structure and function of nervous tissue. Each peripheral nerve is made of bundles of tracts. Central nervous system cns consists of the brain and spinal cord. Oct 30, 20 anatomy and physiology chapter 12 part 1.
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