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Encyclopedia > Ependymal cells
It has been suggested that this article or section be merged with Ependyma. (Discuss)

Ependymal cells are the epithelial cells that line the CSF filled ventricles in the brain and the central canal of the spinal cord. The cells are cuboidal/columnar. They are not the cells that produce the CSF. Their apical surfaces are covered in a layer of cilia, which constantly beat to circulate cerebrospinal fluid around the central nervous system. Wikipedia does not have an article with this exact name. ... Ependyma is the thin epithelial membrane lining the ventricular system of the brain and the spinal cord canal Categories: Anatomy stubs | Physiology ... In zootomy, epithelium is a tissue composed of a layer of cells. ... Cells in culture, stained for keratin (red) and DNA (green). ... Cerebrospinal fluid (CSF), Liquor cerebrospinalis, is a clear bodily fluid that occupies the subarachnoid space in the brain (the space between the skull and the cerebral cortex—more specifically, between the arachnoid and pia layers of the meninges). ... The ventricular system is a set of structures in the brain continuous with the central canal of the spinal cord. ... Comparative brain sizes In animals, the brain, or encephalon (Greek for in the head), is the control center of the central nervous system. ... Cross-section through cervical spinal cord. ... Apical, from the Latin apex (plural apices) meaning to be at the apex or tip, may refer to: An apical consonant, a consonant produced with the tip of the tongue Apical dominance An apical bud An apical pulse: apical pulse is your heart rate when counted with a stethoscope (steth... cross-section of two cilia, showing 9+2 structure A cilium (plural cilia) is a fine projection from a eukaryotic cell that constantly beats in one direction. ... A diagram showing the CNS: 1. ...

Nervous tissue - edit
Neurons: soma, axon (axon hillock, axoplasm, axolemma, neurofibril/neurofilament), dendrite (Nissl bodies, dendritic spine)
types (bipolar, pseudounipolar, multipolar, pyramidal)

Synapses: neuropil, boutons, synaptic vesicle, neuromuscular junction, electrical synapse The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and processes input from the senses, and initiates actions. ... Drawing by Santiago Ramón y Cajal of neurons in the pigeon cerebellum. ... The soma is the bulbous end of a neuron, containing the nucleus. ... An axon, or nerve fiber, is a long slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neurons cell body or soma. ... The axon hillock is the anotomical part of a neuron that connects the cell body to the axon. ... Axoplasm is the cytoplasm of the axon of a neuron. ... The axolemma is the membrane of a neurons axon. ... Intermediate filaments are one component of the cytoskeleton - important structural components of living cells. ... The term Dendrite stems from the Greek word dendron (literally “tree”), and typically refers to the branched projections of a neuron that act to conduct the electrical stimulation received from other cells to and from the cell body, or soma of the neuron from which the dendrites project. ... Close up of the dendrite of a striatal medium spiny neuron. ... As a part of the retina, the bipolar cell exists between photoreceptors (rod cells and cone cells) and ganglion cells. ... Pseudounipolar cells (Pseudo- false, uni- one) are sensory neurons in the peripheral nervous system. ... The multipolar neuron possesses a single (usually long) axon and many dendrites, allowing for the integration of a great deal of information from other neurons. ... A pyramidal cell is a multipolar neuron located in the hippocampus and cerebral cortex. ... Illustration of the major elements in a prototypical synapse. ... Neuropil is the feltwork of unmyelinated neuronal processes (axonal and dendritic) within the gray matter of the central nervous system Traditionally, when pathologists looked at brain tissue they concentrated on neurons (the active functioning cells of the brain), glial cells and axons (especially in white matter, which is mostly composed... In a synapse, a bouton (or synaptic button, or presynaptic button) is a protuberance at the pre-synaptic nerve terminal where two axons connect with each other. ... In a neuron, synaptic vesicles, also called neurotransmitter vesicles, store the various neurotransmitters that are released during calcium-regulated exocytosis at the presynaptic terminal into the synaptic cleft of a synapse. ... A neuromuscular junction is the junction of the axon terminal of a motoneuron with the motor end plate, the highly-excitable region of muscle fiber plasma membrane responsible for initiation of action potentials across the muscles surface. ... An electrical synapse is a mechanical and electrically conductive link between two abutting neurons that is formed at a narrow gap between the pre- and postsynaptic cells known as a gap junction. ...

Sensory receptors: Free nerve ending, Meissner's corpuscle, Merkel nerve ending, Muscle spindle, Pacinian corpuscle, Ruffini ending, Olfactory receptor neuron, Photoreceptor, Hair cell, Taste bud In a sensory system, a sensory receptor is a structure that recognizes a stimulus in the internal or external environment of an organism. ... NERVE ENDINGS SUCK PENIS!!! ... Meissners corpuscles (discovered by the anatomist Georg Meissner (1829-1903) are a type of mechanoreceptor and more specifically, a tactile corpuscle(corpusculum tactus). ... Merkel nerve endings are mechanoreceptors found in the skin and mucosa of vertebrates that provide touch information to the brain. ... A muscle spindle is a specialized muscle structure innervated by both sensory and motor neuron axons. ... A Pacinian corpuscle is a structure that functions as a mechanoreceptor. ... Ruffini Endings are one of the four main cutaneous mechanoreceptors. ... An olfactory receptor neuron, also called an olfactory sensory neuron, is the primary transduction cell for olfaction in the olfactory system. ... A photoreceptor is a specialized form of cell (specifically, neuron) that is capable of phototransduction. ... Hair cells are the sensory cells of both the auditory system and the vestibular system in all vertebrates. ... Taste buds are small structures on the upper surface of the tongue, soft palate, and epiglottis that provide information about the taste of food being eaten. ...

Glial cells: astrocyte, ependymal cells, microglia, radial glia This article or section does not cite its references or sources. ... Astrocytes, also known as astroglia, are characteristic star-shaped glial cells in the brain. ... Microglia are a type of glial cell that act as the immune cells of the Central nervous system (CNS). ... Radial glial cells are a pivotal cell type in the developing CNS involved in key developmental processes, ranging from patterning and neuronal migration to their newly described role as precursors during neurogenesis. ...

Myelination: Schwann cell, oligodendrocyte, nodes of Ranvier, internode, Schmidt-Lanterman incisures, neurolemma In neuroscience, myelin is an electrically insulating phospholipid layer that surrounds the axons of many neurons. ... Schwann cells are a variety of neuroglia that wrap around axons in the peripheral nervous system, forming the myelin sheath. ... Oligodendrocytes (from Greek literally meaning few tree cells), or oligodendroglia (Greek, few tree glue)[1], are a variety of neuroglia. ... This article is about Anatomy, for the musical group see Nodes of Ranvier (band) Nodes of Ranvier are regularly spaced gaps in the myelin sheath around an axon or nerve fiber. ... Neurolemma (spelled also neurolema, neurilemma and neurilema, and used interchangeably with epineurium) is the insulating myelin layer that surrounds an individual peripheral nerve fiber. ...

Connective tissue: epineurium, perineurium, endoneurium, meninges In the human body there are four types of tissue: (1) Epithelial, (2) Connective, (3) Muscle, and (4) Nervous Tissue. ... Neurolemma (spelled also neurolema, neurilemma and neurilema, and used interchangeably with epineurium) is the insulating myelin layer that surrounds an individual peripheral nerve fiber. ... The nerve fibers are held together and supported within the funiculus by delicate connective tissue, called the endoneurium. ... The meninges (singular meninx) are the system of membranes that envelop the central nervous system. ...

  Results from FactBites:
Glial cell - Wikipedia, the free encyclopedia (1353 words)
Oligodendrocytes are cells that coat axons in the central nervous system (CNS) with their cell membrane, called myelin, producing the so-called myelin sheath.
Ependymal cells, also named ependymocytes, line the cavities of the CNS and beat their cilia to help circulate the cerebrospinal fluid.
In the retina, the radial Müller cell is the principal glial cell, and participates in a bidirectional communication with neurons.
4. The Adult Stem Cell [Stem Cell Information] (11899 words)
The bone marrow-derived cells are sometimes sorted—using a panel of surface markers—into populations of hematopoietic stem cells or bone marrow stromal cells [46, 54, 71].
Adjacent to the ependymal cell layer, in a region sometimes designated as the subependymal or subventricular zone, is a mixed cell population that consists of neuroblasts (immature neurons) that migrate to the olfactory bulb, precursor cells, and astrocytes.
Neural stem cells in the mammalian fetal brain are concentrated in seven major areas: olfactory bulb, ependymal (ventricular) zone of the lateral ventricles (which lie in the forebrain), subventricular zone (next to the ependymal zone), hippocampus, spinal cord, cerebellum (part of the hindbrain), and the cerebral cortex.
  More results at FactBites »



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