What is the Difference Between Thyroid and Parathyroid?

🆚 Go to Comparative Table 🆚

The thyroid and parathyroid glands are two distinct glands located in the neck region, each with specific roles in the body.

Thyroid Gland:

  • The thyroid gland is responsible for producing hormones that regulate metabolism, growth, and development.
  • It produces two main hormones: thyroxine (T4) and triiodothyronine (T3), which play a crucial role in controlling how the body uses energy, regulating body temperature, and aiding in the growth and development of tissues.
  • The pituitary gland controls the thyroid, producing thyroid-stimulating hormone (TSH) to trigger the production of thyroid hormones.

Parathyroid Glands:

  • The parathyroid glands are four tiny glands located behind the thyroid gland.
  • They produce parathyroid hormone (PTH), which helps control the amount of calcium in the blood.
  • PTH stimulates calcium release from bones, increases calcium absorption in the intestines, and reduces calcium excretion in the kidneys.

In summary, the thyroid gland produces hormones that regulate metabolism, growth, and development, while the parathyroid glands produce hormones that regulate calcium and phosphate levels in the blood.

Comparative Table: Thyroid vs Parathyroid

Here is a table comparing the differences between the thyroid and parathyroid glands:

Feature Thyroid Gland Parathyroid Gland
Location Neck region, on both sides of the trachea Backside of the thyroid gland, four in total
Size Large Small
Hormones Thyroxine (T4), triiodothyronine (T3), and calcitonin Parathyroid hormone (PTH)
Main Functions Regulates metabolism, growth, and development Regulates calcium and phosphate levels in the blood
Composition Follicular cells and stromal tissues Chief cells and oxyphil cells

The thyroid gland is an endocrine gland that produces hormones such as thyroxine (T4), triiodothyronine (T3), and thyrocalcitonin (TCT). These hormones regulate the body's basal metabolic rate, the metabolism of carbohydrates, proteins, and fats, as well as water and electrolyte balance. On the other hand, the parathyroid gland produces parathyroid hormone (PTH), which is responsible for regulating calcium and phosphorus levels in the blood.