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Endocrine system

Endocrine glands

  • Hormones are secreted by endocrine glands such as the pituitary gland, thyroid gland, adrenal gland, pancreas etc.
  • Major endocrine glands in humans are
    • Pituitary
    • Hypothalamus
    • Pineal
    • Thyroid
    • Thymus
    • Pancreas
    • Adrenal
    • Testis in men /ovary in women
  • A feedback mechanism (positive and negative) regulates the action of the hormones.

Characteristics of hormones:

  • Hormones act as chemical messengers.

  • They are secreted by living cells/tissues or organs called glands.

  • They are secreted in very small quantities by g…

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