#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"
  supertype:  male_reproductive_gland  gonad
  subtype:  undescended_testis  a testis that fails to move into the scrotum as the male fetus develops; "undescended testicles have an increased risk for cancer"
  part of:  male_reproductive_system  male_genitalia
  part:  testicular_artery__internal_spermatic_artery__arteria_testicularis  a branch of the aorta supplying the testicles
  part:  testicular_vein__vena_testicularis  a vein from the testicles
  part:  seminiferous_tubule  any of the numerous long convoluted tubules in the testis which are the sites where spermatozoa mature
  part:  epididymis  a convoluted tubule in each testis; carries sperm to vas deferens
     part:  vasa_efferentia  the several highly convoluted tubules that lead from the rete testis to the vas deferens and form the head of the epididymis
  part:  rete_testis  network of tubules carrying sperm from the seminiferous tubules to the vasa efferentia
  part:  vas_deferens__ductus_deferens  a duct that carries spermatozoa from the epididymis to the ejaculatory duct
  part:  spermatic_cord__spermaticcord  a structure resembling a cord that suspends the testis within the scrotum and contains the vas deferens and other vessels and nerves

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