Which organ is associated with biological rhythm in mammals?

Option 1 : Pineal

The Correct Answer is Pineal.

• The main circadian clock in mammals is in the suprachiasmatic nucleus(SCN), a pair of independent cell groups in the hypothalamus.
  • SCN destruction results in the complete absence of a normal pattern of sleep-wake. The SCN receives information from the eyes about illumination.
  • The SCN takes the details on the day and night cycles from the retina interpret it and pass it on to the pineal gland, a tiny organ shaped like a pine cone and on the epithelium.

• The pineal gland is a tiny endocrine gland in most vertebrate brains.
• The pituitary gland is also referred to as the master gland since it regulates the body's many other hormone glands, including the thyroid and adrenals, ovaries, and testes. The thyroid is a gland shaped like a butterfly that lies low on the front of the neck.
• The thymus is an Immune System specialist primary lymphoid organ.