ramus communicans (pl. rami communicantes) A structure containing nerve fibres that runs from a spinal nerve to a ganglion of the sympathetic nervous system (see autonomic nervous system). The sympathetic ganglia form a series down each side of the vertebral column; each is connected to the ventral root of a spinal nerve by a pair of rami communicantes.
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Spinal nerves , spinal nerves Pairs of nerves that arise from the spinal cord (compare cranial nerves). In humans there are 31 pairs (one from each of the vertebrae)… Painter, Eleanor (1890–1947) , pair / pe(ə)r/ • n. a set of two things used together or regarded as a unit: a pair of gloves. ∎ an article or object consisting of two joined or cor… System , sys·tem / ˈsistəm/ • n. 1. a set of connected things or parts forming a complex whole, in particular: ∎ a set of things working together as parts of… Rib , rib / rib/ • n. 1. each of a series of slender curved bones articulated in pairs to the spine (twelve pairs in humans), protecting the thoracic cavit… Labium , labium (pl. labia) 1. The lower lip in the mouthparts of an insect, which is used in feeding and is formed by the fusion of a pair of appendages (the… myotome , myotome One of a series of segmented muscle blocks found in fishes and lancelets. Myotomes are arranged in pairs on either side of the body that work…
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