ⓘ Johnston's organ


ⓘ Johnstons organ

Johnstons organ is a collection of sensory cells found in the pedicel of the antennae in the class Insecta. Johnstons organ detects motion in the flagellum. It consists of scolopidia arrayed in a bowl shape, each of which contains a mechanosensory chordotonal neuron. The number of scolopidia varies between species. In homopterans, the Johnstons organs contain 25 - 79 scolopidia. The presence of Johnstons organ is a defining characteristic which separates the class Insecta from the other hexapods belonging to the group Entognatha. Johnstons organ was named after the physician Christopher Johnston, father of the physician and Assyriologist Christopher Johnston.

  • each equipped with up to four sensory neurons as in the mosquito Johnston s organ The bipolar sensory neurons each have an apical dendritic structure
  • chordotonal organ Hymenoptera bees, wasps, ants, etc. do not have a tympanal organ but they do have a Johnston s organ Tympanal organs occur in just
  • to discriminate frequencies Johnston s organ located in the antennae senses motion of an antenna relative to the insect s body There are many types of
  • physician Christopher Johnston 1822 - 1891 a professor of surgery at the University of Maryland and the discoverer of Johnston s organ and Sarah Lucretia
  • Organ transplantation is a medical procedure in which an organ is removed from one body and placed in the body of a recipient, to replace a damaged or
  • wearing a T - shirt that featured artwork from Johnston s 1983 album Hi, How Are You. Beyond music, Johnston was accomplished as a visual artist, with his
  • Thomas Johnston 1708 1767 was an American engraver, japanner, heraldic painter, and a church organ builder. He is noted for making the first historical
  • Robert Morton, including the Los Angeles Art Organ Company, the Johnston Organ Company, and the California Organ Company. Despite all the corporate change
  • An organ scholar is a young musician employed as a part - time assistant organist at a cathedral, church or institution where regular choral services are
  • Tom, Thomas or Tommy Johnston may refer to: Thomas Johnston engraver 1708 1767 engraver and organ builder Thomas A. Johnston 1848 1934 American
  • This is a list of notable pipe organ builders. William Anderson 1832 1921 Australian Pipe Organs Pty Ltd Robert Cecil Clifton 1854 1931 William Davidson
  • the second segment of the antenna in the class Insecta, where the Johnston s organ is found Pedicel or petiole insect the stem formed by a restricted