Visit to a blind student's school🧑🦯🧑🦯(community medicine)
Pineal gland
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4. 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
5. 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.
6. 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)
7. 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.