#endocrine_gland__endocrinegland__ductless_gland  any of the glands of the endocrine system that secrete hormones directly into the bloodstream
  supertype:  #gland__secretory_organ__secretoryorgan__secretor__secreter  any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream
  part of:  #endocrine_system
  subtype:  #thyroid_gland__thyroidgland__thyroid  located near the base of the neck
  subtype:  #parathyroid_gland__parathyroidgland__parathyroid  any one of four endocrine glands situated above or within the thyroid gland
  subtype:  #adrenal_gland__adrenalgland__adrenal__suprarenal_gland  either of a pair of complex endocrine glands situated near the kidney
  subtype:  #prostate_gland__prostate  a firm partly muscular chestnut sized gland in males at the neck of the urethra; produces a viscid secretion that is the fluid part of semen
  subtype:  #thymus_gland__thymus  a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity; atrophies with age
  subtype:  #pituitary_gland__pituitary__pituitarybody__hypophysi  the master gland of the endocrine system; located at the base of the brain
  subtype:  #anterior_pituitary_gland__anterior_pituitary__adenohypophysis  the anterior lobe of the pituitary body; primarily glandular in nature
  subtype:  #pars_distilis__pars_anterior  the anterior part of the anterior pituitary
  subtype:  #pars_intermedia  a thin piece of tissue that has become part of the posterior pituitary
  subtype:  #posterior_pituitary_gland__posteriorpituitarygland__posterior_pituitary__posteriorpituitary__neurohypophysis__neurohypophysi__pars_nervosa  the posterior lobe of the pituitary body; primarily glandular in nature
  subtype:  #pineal_gland__pineal_body__epiphysis_cerebri__epiphysiscerebri__epiphysis__epiphysi  a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
  subtype:  #islands_of_Langerhans__isles_of_Langerhans__islets_of_Langerhans  cell clusters in the pancreas that form the endocrine part of that organ; secrete insulin and other hormones
  subtype:  #adrenal_cortex__adrenalcortex  the cortex of the adrenal gland; secretes corticosterone and sex hormones
  subtype:  #adrenal_medulla__adrenalmedulla  the medulla of the adrenal gland; secretes epinephrine
  subtype:  #corpus_luteum  yellow endocrine tissue that forms in a ruptured Graafian follicle following the release of an ovum
  subtype:  #gonad  a gland in which gametes (sex cells) are produced
     subtype:  #ovary  one of usually two organs that produce ova and (in vertebrates) secrete estrogen and progesterone
     subtype:  #ovotestis__ovotesti  hermaphroditic gonad that contains both testicular and ovarian tissue
     subtype:  #testis__testicle__orchis__ball__ballock__bollock__nut  one of the two male reproductive glands that produce spermatozoa and secrete androgens; "she kicked him in the balls and got away"
        subtype:  #undescended_testis__undescended_testicle__undescendedtesticle  a testis that fails to move into the scrotum as the male fetus develops; "undescended testicles have an increased risk for cancer"

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