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PINEAL GLAND & THYMUS GLAND

PINEAL GLAND & THYMUS GLAND. PINEAL GLAND. Small body attached to the roof of the 3 rd 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

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PINEAL GLAND & THYMUS GLAND

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  1. PINEAL GLAND & THYMUS GLAND

  2. 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

  3. 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.

  4. 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)

  5. 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.

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