The correct answer is ?Adrenal gland

Key Points

• The adrenal glands are small glands located on top of each kidney.
• The adrenal cortex produces several hormones.
• The most important are aldosterone (a mineralocorticoid), cortisol (a glucocorticoid), and androgens and estrogen (sex hormones).
• These hormones help regulate metabolism, immune system, blood pressure, response to stress, and or essential functions.

Additional Information

• Thyroid gland:?
  • It produces hormones that regulate body's metabolic rate-controlling like heart, muscle, and digestive function, brain development and bone maintenance.
  • Its good functioning depends on a good supply of iodine from diet. 
• Thymus gland:?
  • The thymus is a lobed organ situated near heart and, beneath breastbone.
  • It is quite large at time of birth but it gradually gets reduced with age.
  • The thymus provides micro-environment needed for maturation & development of T-lymphocytes.
  • The T-lymphocyte cells originate in bone marrow but migrate or move to thymus for maturation & development, hence if thymus gland is removed from newborn baby T-lymphocyte cells will not form.
• Corpus luteum:
  • ?The follicular cell is known as corpus luteum.
  • The Corpus luteum is a follicular cell and gets filled with a yellow pigment called lutein.

The correct answer is Hair.Key Points

• The part of human body that grows at a rate of about half an inch per month is Hair.

• This consistent growth rate applies to hair across entire head.

• Human hair follicles go through distinct phases as part of ir natural growth cycle. These phases include:

  • Anagen (Growth Phase): During anagen phase, hair actively grows for several years at a rate of about half an inch (1.25 centimetres) per month. 

  • Catagen (Transition Phase): In this short transitional phase, hair follicle shrinks and detaches from blood supply.

    • It lasts for about 2 to 3 weeks.

  • Telogen (Resting Phase): During telogen phase, hair follicle remains dormant.

  • Exogen (Shedding Phase): Exogen is shedding phase when old hairs fall out naturally.

    • It’s a normal part of hair cycle.