Bee venom is used for and released . . . . . . . . from acid glands.

Bee venom is used for and released Curing pains at joints from acid glands.
Bee venom is secreted by a gland located in the abdominal cavity of the bees. It is an odorless and transparent acidic liquid that bees often use as a defense tool against predators. Honeybee venom (commercially known as Apitox or Apitoxin) is a combination of different compounds.
Bee venom seemed to prevent arthritis with the help of hormones called glucocorticoids. These hormones help regulate inflammation. The use of bee venom, with the help of glucocorticoids, might slow the progression of inflammatory arthritis.