1. Adrenal, ovaries 
  2. Pancreas, thyroid
  3. Pituitary, thyroid
  4. Pituitary, pancreas
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1 Answers

Option 1 : Adrenal, ovaries 

The correct answer is Adrenal, Ovaries.

Concept:

  • Endocrine glands are ductless glands, i.e., lack ducts. 
  • They release their secretion into the surrounding bloodstream for transport to the site of action or a distant target organ.
  • Examples: Hypothalamus, Pituitary gland, Thyroid gland, Adrenal gland, Ovaries, etc.

Explanation:

  • Adrenal Gland:
    • In human beings, Adrenal glands are present in pairs.
    • Each gland is located at the anterior portion of each kidney.
    • Adrenal glands are conical yellowish bodies composed of two types of tissues i.e., Adrenal cortex and Adrenal medulla.
  • Ovaries:
    • These are the primary sex organ in females that serve to produce ova (female gametes) and female sex hormones.
    • A pair of ovaries are located in the pelvic cavity (in the abdomen).
    • It is an almond-shaped structure. 
  • While Thyroid gland, Pancreas, and Pituitary gland are not present in pairs in human beings.

Thus, Adrenal gland and Ovaries occur in pairs in human beings.

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