#plant_tissue__planttissue  the tissue of a plant
  supertype:  tissue  a part of an organism consisting of an aggregate of cells having a similar structure and function
  substance of:  plant
  subtype:  interstitial_tissue  tissue between the cells of a structure or part in plant or animal
     subtype:  neuroglia  sustentacular tissue that surrounds and supports neurons in the central nervous system; glial and neural cells together compose the tissue of the central nervous system
        subtype:  astroglia__macroglia  tissue consisting of large stellate neuroglial cells
        subtype:  microglia  neuroglial tissue of mesodermal origin that can become phagocytic
        subtype:  oligodendroglia  tissue consisting of glial cells with sheet-like processes that form the myelin sheath of nerve fibers
  subtype:  fibrous_tissue__fibroustissue  tissue consisting or or containing fibers in both animals and plants
     subtype:  trabecula  rod-shaped structures of fibrous tissue that divide an organ into parts (as in the penis) or stabilize the structure of an organ (as in the spleen)
  subtype:  cortex  the tissue forming the outer layer of an organ or structure in plant or animal
     subtype:  adrenal_cortex__adrenalcortex  the cortex of the adrenal gland; secretes corticosterone and sex hormones
     subtype:  renal_cortex__renalcortex  the cortex of the kidney containing the glomeruli and the convoluted tubules
  subtype:  medulla  the inner part of an organ or structure in plant or animal
     subtype:  adrenal_medulla__adrenalmedulla  the medulla of the adrenal gland; secretes epinephrine
  subtype:  stroma.plant_tissue  the dense colorless framework of a chloroplast
  subtype:  pulp.plant_tissue__flesh  a soft moist part of a fruit
  subtype:  pith  soft spongelike central cylinder of the stems of most flowering plants
  subtype:  parenchyma.plant_tissue  the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems
  subtype:  lignum  woody tissue
  subtype:  vascular_tissue  tissue that conducts water and nutrients through the plant body in higher plants
     subtype:  stele  the usually cylindrical central vascular portion of the axis of a vascular plant
     subtype:  cambium.vascular_tissue  formative one-cell-thick layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth
     subtype:  vascular_bundle__vascular_strand__fibrovascular_bundle__fibrovascularbundle  a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
     subtype:  vascular_ray__medullary_ray__medullaryray  a sheet of vascular tissue separating the vascular bundles
     subtype:  xylem  the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
     subtype:  tracheid  long tubular cell peculiar to xylem
     subtype:  phloem__bast  (botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes
     subtype:  sieve_tube__sievetube  tube formed by cells joined end-to-end through which nutrients flow in flowering plants and brown algae
  subtype:  pseudophloem  false phloem
  subtype:  gall  abnormal swelling of plant tissue caused by insects or microorganisms or injury
     subtype:  oak_apple__oakapple  oak gall caused by larvae of a cynipid wasp
  subtype:  meristem  undifferentiated tissue from which new cells are formed, as at the tip of a stem or root
  subtype:  skin.plant_tissue__rind  the tissue forming the hard outer layer of e.g. a fruit

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