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The endocrine system is made up of glands that secrete hormones directly into the bloodstream to regulate bodily functions. The major glands include the pituitary gland which regulates many other glands; the thyroid gland which regulates growth and metabolism; the parathyroid glands which regulate calcium levels; the adrenal glands which produce hormones involved in stress response and blood pressure regulation; and the gonads (testes and ovaries) which produce gametes and sex hormones. These glands work in coordination with the nervous system to maintain homeostasis.




















