Thyroid Gland

Kasey Mull and Abby Pennington


  • Butterfly shaped
  • Has 2 side lobes, connected by the isthmus
  • Sits at the front of the neck below the Adam's apple


  • The anterior portion of the neck
  • In front of the trachea
  • Below the larynx


  • It takes iodine (found in foods) and convert it into thyroid hormones
  • Regulates metabolism, heart rate, energy consumed
  • These functions are controlled under the pituitary gland, when our thyroid hormones drop too low, it produces thyroid stimulating hormone to increase production of thyroid hormones

Specialized Cells

  • Follicular Epithelial Cells: are the only cells that can absorb iodine in the body
  • C-Cells: are cells that secrete the hormone calcitonin
Big image

Hormones and their Functions

  • Calcitonin- acts to reduce blood calcium
  • Thyroxine (T3)- stimulates consumption of oxygen resulting in increase metabolism
  • Triiodothyronine- (T4) maintains metabolism, heart rate, muscle control, brain development and bone growth. There is a higher production of this hormone compared to the other ones (80%).