| anus | The posterior opening of the alimentary canal [Brenda]. | — |
| grey matter | Grey matter (or gray matter) is a major component of the central nervous system, consisting of neuronal cell bodies, neuropil (dendrites and unmyelinated axons), glial cells (astroglia and oligodendrocytes) and capillaries. Grey matter contains neural cell bodies, in contrast to white matter, which does not and mostly contains myelinated axon tracts. The color difference arises mainly from the whiteness of myelin. In living tissue, grey matter actually has a grey-brown color, which comes from capillary blood vessels and neuronal cell bodies [Wikipedia: http://en.wikipedia.org/wiki/Grey_matter]. | — |
| cecum | The first part of the large intestine, forming a dilated pouch into which open the ileum, colon, and appendix vermiformis [Brenda]. | — |
| dendrite | Dendrites (from Greek δÎνδÏον déndron, âtreeâ) are the branched projections of a neuron that act to conduct the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project. Electrical stimulation is transmitted onto dendrites by upstream neurons via synapses which are located at various points throughout the dendritic arbor. Dendrites play a critical role in integrating these synaptic inputs and in determining the extent to which action potentials are produced by the neuron. Recent research has also found that dendrites can support action potentials and release neurotransmitters, a property that was originally believed to be specific to axons [Wikipedia: http://en.wikipedia.org/wiki/Dendrite]. | — |
| synapse | In the nervous system, a synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell (neural or otherwise). The word "synapse" comes from "synaptein", which Sir Charles Scott Sherrington and colleagues coined from the Greek "syn-" ("together") and "haptein" ("to clasp") [Wikipedia: http://en.wikipedia.org/wiki/Synapse]. | — |
| neuron | A grayish or reddish granular cell with specialized processes that is the fundamental functional unit of nervous tissue [Brenda]. | — |
| glia | The delicate network of branched cells and fibers that supports the tissue of the central nervous system [Brenda]. | — |
| axon | An axon (also known as a nerve fiber) is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body or soma [Wikipedia: http://en.wikipedia.org/wiki/Axon]. | — |
| prefrontal cortex | The prefrontal cortex is the anterior part of the frontal lobes of the brain, lying in front of the motor and premotor areas [Brenda]. | — |
| nucleus proprius | The Nucleus proprius is a layer of the spinal cord adjacent to the substantia gelatinosa. Nucleus proprius constitutes the bulk of the dorsal horn and receives inputs from the dorsal root ganglions that carry sensory information, such as light touch, as well as pain and temperature information. Cells in this nucleus project to deeper laminae of the spinal cord, to the posterior column nuclei, and to other supraspinal relay centers including the midbrain, thalamus, and hypothalamus. Rexed laminae III, IV, and V make up the nucleus proprius [Wikipedia: http://en.wikipedia.org/wiki/Nucleus_proprius_of_spinal_cord]. | — |
| lateral column | In the thoracic region, the postero-lateral part of the anterior column projects lateralward as a triangular field, which is named the lateral column (lateral cornu, lateral horn) [Wikipedia: http://en.wikipedia.org/wiki/Lateral_horn_of_spinal_cord]. | — |
| intermediolateral column | The intermediolateral nucleus (IML) is a region of gray matter found in Rexed lamina VII of the spinal column [Wikipedia: http://en.wikipedia.org/wiki/Intermediolateral_nucleus]. | — |
| nephron | A single excretory unit of the vertebrate kidney [Brenda]. | — |
| sacral parasympathetic nucleus | — | — |
| ventral column | — | — |
| retrodorsolateral column | — | — |
| dorsomedial column | — | — |
| phrenic nucleus | A nucleus comprised of motor neurones located in medial areas of the ventral horn of the spinal cord from about C3 to C6; axons of neurones in this nucleus innervate the diaphragm [Mondofacto: http://www.mondofacto.com/facts/dictionary?phrenic+nucleus]. | — |
| ventrolateral column | — | — |
| ventromedial column | The axons in the ventromedial column of the spinal cord that are involved in the control of posture and locomotion and are under brain stem control [Quizlet: http://quizlet.com/dictionary/ventromedial%2Bpathway/]. | — |
| glomerulus | In the kidney, a tubular structure called the nephron filters blood to form urine. At the beginning of the nephron, the glomerulus is a network (tuft) of capillaries that performs the first step of filtering blood [Wikipedia: http://en.wikipedia.org/wiki/Glomerulus]. | — |
| accessory nucleus | The spinal accessory nucleus lies within the cervical spinal cord (C1-C5) in the ventral horn. The nucleus ambiguus is classically said to provide the "cranial component" of the accessory nerve [Wikipedia: http://en.wikipedia.org/wiki/Spinal_accessory_nucleus]. | — |
| lumbosacral nucleus | — | — |
| eyelid | Either of the movable folds of skin and muscle that can be closed over the eyeball [Brenda]. | — |
| testis | A typically paired male reproductive gland that produces sperm and that in most mammals is contained within the scrotum at sexual maturity [Brenda]. | — |
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