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Pineal gland

pineal gland

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Pineal gland

  1. 1. PINEAL GLAND Small body attached to the roof of the 3rd ventricle of the brain Containing nerves that connect to the hypothalamus 10mm long, reddish and surrounded by capsule Becomes atrophy after puberty and calcified later in life Secrete the hormone melatonin
  2. 2. Function of Melatonin Coordinating circadian rhythm. As a timing signal to coordinate events the light-dark cycle in the environment. It increasing secretion of GnRH and sex hormones. Inhibits growth and development of sex organs before puberty.
  3. 3. THYMUS GLAND specialized organ of the immune system locate at upper part of the chest, behind the breastbone, and is made up of two lobes that join in front of the trachea. Secretes hormone called thymosin thymus produces and "educates" T- lymphocytes (T cells)
  4. 4. Function of Thymosin Its function is to transform lymphocytes (white blood cells developed in the bone marrow) into T-cells (cells developed in the thymus). These cells are then transported to various lymph glands, where they play an important part in fighting infections and disease.