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. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Neurons soma processes dendrites axon axon hillock terminal arborization sinaptic buttons. Extends from the cns to structures of the body viscera or periphery. Unmyelinated nerve fibers cannot be found in the peripheral nerves. The basic histology component of the course will concentrate on the microanatomy of the four basic tissues, namely. Sami zaqout iug general characteristics of muscles the structural and functional units of muscles are formed of special elongated cells known as muscle fibers. Mp3 files, with questions and answers read aloud, have been recorded by m. The human nervous system contains more than 10 billion neurons that vary considerably in size and shape. Each cell consists of the following parts see figure 1. Connective tissue sheath of the peripheral nerves, which include see diagram 1. Central nervous system cns consists of the brain and spinal cord.
Peripheral nerves can be found in the brain cortex. They are electrically active and release chemical signals to target cells. Nervous tissue consists of two kinds of nerve cells. Pns, peripheral nervous system all other neural tissue, nerves, receptors, neuroglia. It investigates the plasticity of synapses, their degeneration and regeneration, neuronal inclusions, rna of nervous tissue, and molecular organization of neural information processing. Pdf a detailed anatomy and histological structure of the brain and spinal cord, referring to the central nervous system and special sensory. 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. 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. Distinguish the major functions of the nervous system.
It is the conducting cell that transmits impulses and the structural unit of the nervous system. Histology and virtual microscopy learning resource. Although the nervous system is very complex, there are only two main types of cells in nerve tissue. Nervous tissue, also called neural tissue, is the main tissue component of 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. Nervous tissue makes up one of the four basic tissue types. Note the initial portions of the dendrites and axon that arise from the neuronal body. Nervous tissue is composed of two types of cells, neurons and glial cells. The cellular unit of the nervous system is the neuron.
Scribd is the worlds largest social reading and publishing site. An axon is the long stemlike part of the cell that sends action potentials to the next cell. Study histology of nervous tissue flashcards at proprofs ex. A bundle of neuron processes wrapped in connective tissue wrappings. Use the virtual microscope or other histology sites for images of nerve tissue. The cytoplasm of these muscle fibers is known as sarcoplasm. 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. Lectures will provide you with an outline of the topic, but you are expected to supplement the information with private study. Connective tissue proper of the nervous tissue which include. Intro to the nervous system tissue and physiology nervous system. The afferent or sensory neurons conduct nerve impulses from the sense organs and receptors to the central nervous. Nerve tissue as in the brain, spinal cord and peripheral nerves that branch throughout the body are all.
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. Scattered around the neuron are many neuroglial cells, which in addition to neurons are the. Like other parts of the peripheral nervous system, these ganglia are covered by a thin connective tissue layer, essentially a perineurium. They do not necessarily represent the quality of questions which will appear on the unit evaluation.
Surrounds all of the neuron processes contributing to a nerve. Nerve vary in size, but every nerve consist of parallel bundles peripheral axons. Blood now, without any further painstaking ado, we will move on to the main part. Monitoring changes in internal and external environment stimuli. 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. Loose areolar connective tissue papillary layer of dermis hypodermis around organs basement membrane of mucous membranes surrounding blood vessels blood vessel. 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.
Name four types of neuroglia in the cns, and list at least four functions of these cells. Peripheral nervous system pns all nerves emergingarriving to cns nervous tissue cellularity. Having looked at the components of nervous tissue, and the basic anatomy of the. The following questions are designed for introductory drill. Chapter 11 lecture a histology of nervous tissue youtube. Prepared staining kits for histology and pathology emsdiasum. Physiology ii and biochemistry ii focuses on the structure and function of nervous tissue. 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. Neurons are the basic structural unit of the nervous system. Identify the tissue type and a location where it is found. Nerve cells are highly specialized to react to stimuli and conduct the excitation from one region of the body to another. The human nervous system consists of the central nervous system cns and the peripheral nervous system pns.
The other type of cell is neuroglia, or glial, cell. Histology of neuron principle cells of nervous tissue consist of 3 parts. Muscle and nervous tissue quiz yakima valley college. The structure and function of nervous tissue, volume iv. The present updated edition is an illustrated account of microscopic structures of tissues and organs in a simple and precise.
The cell body contains the nucleus and other cellular organelles. This is a section of the spinal cord revealing the cell body of one of the large alpha motor neurons. Pdf neuroanatomy and histology of the central nervous system. Cells in both central and peripheral nerve tissue are of two kinds. 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. What links here related changes upload file special pages permanent link page information wikidata item cite. 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. Previous quiz connective tissue next introduction to tissues. The stimuli are analysed and integrated to provide appropriate, coordinated responses in various organs. Cell body perikaryonsoma a single axon multiple dendrites07122012 3. Histology of nervous tissue neuroglia neurons myelination nervous tissue. Like cns, but unlike other nonenteric autonomic ganglia, these enteric ganglia exclude connective tissue, and.
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. Ssb histology nervous tissue saq siu school of medicine. The structure and function of nervous tissue v2 1st edition. Nervous tissue is a part of the vertebrate tissue that protects the nervous system.
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. 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. Neuroglia and neuron link to more detailed screens. 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. 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. Cns is composed of the brain located in the cranial cavity and the spinal cord located in the vertebral cavity, which serve as the main control centers for all body activities. 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. Peripheral nervous system pns, composed of the cranial, spinal, and peripheral nerves conducting impulses to and from the cns sensory and motor nerves. List the sequence of events in a simple sensory receptormotor response pathway.
A neuron is a basic structural unit of the nervous system containing a cell body, dendrites, and an axon. Nervous tissue consists of two main types of cells. Nervous tissue is made up of different types of neurons, all of which have an axon. Each peripheral nerve is made of bundles of tracts. Functions of nerve tissue nervous tissue allows an organism to sense stimuli in both the internal and external environment. Click on the sound icon for the audio file mp3 format for each slide. Histology of nervous tissue slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. For staining microglia, fibroglia, fibrin and coarse fibrils. Nervous tissue the most complex of the four basic tissues, is composed of nerve cells, the neurons and supporting. Nerve is a cordlike organ that is part of peripheral nervous system. Neurons are the primary type of cell that most anyone associates with the nervous system. 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. Nervous system is divided anatomically into two major components.
The basic functional unit of the nervous system is the neuron. Textbook of histology a practical guide jp gunasegaran pdf. Nervous tissue is the primary tissue that composes the central nervous system and the peripheral nervous system. Oct 30, 20 anatomy and physiology chapter 12 part 1. They are responsible for sensing stimuli and transmitting signals to and from different parts of an organism. Nerve tissue nervous tissue, one of the four basic tissues, consists of nerve cells neurons and supporting cells neuroglia. Peripheral nervous system pnsall cranial and spinal nerves and their associated roots and ganglia functional pns divisions. Prepared staining kits for histology and pathology j. This book is designed for undergraduate medical and dental students.