Topic summary
Parathyroid glands
Extracted from the Wikipedia article Parathyroid gland.
Other animals
Parathyroid glands are found in all adult tetrapods; they vary in their number and position. Mammals typically have four parathyroid glands, while other types of animals typically have six. The removal of parathyroid glands in animals produces a condition resembling acute poisoning with irregular muscle contractions.