๐”– Bobbio Scriptorium
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Function of the parathyroid gland of the snake,Thamnophis sirtalis

โœ Scribed by Clark, Nancy B.

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
445 KB
Volume
178
Category
Article
ISSN
0022-104X

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โœฆ Synopsis

Garter snakes, Thamnophis sirtalis, have four parathyroid glands that are similar histologically to those of other reptiles. A high percentage of the animals also possess accessory parathyroid tissue. Complete parathyroidectomy of the snakes produced severe depression of serum calcium values, tetanic convulsions, and significant elevation of serum phosphate within several weeks of the operation. Administration of mammalian parathyroid extract to normal snakes had the opposite effects, elevating serum calcium and depressing serum phosphate concentrations. In contrast, mammalian calcitonin preparations did not significantly affect serum calcium or phosphate values.

The parathyroid glands of snakes thus function to maintain normal neuromuscular coordination by regulating blood calcium and phosphate concentrations.

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