The pyrophysiology and sexuality of dragons

Our plain-English summary of The pyrophysiology and sexuality of dragons, by S.T. Georgy, J.G. Widdicombe (Respiratory Physiology & Neurobiology, 2002).

The study

• Authors: S.T. Georgy, J.G. Widdicombe
• Journal: Respiratory Physiology & Neurobiology
• Published: 2002;133(1-2):3-10; discussion 1-2
• Type of article: Review
• Cited by: 2 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

To examine the means whereby dragons produce fire and steam, we have studied a related species, the desert-lizard Lacerta pyrophorus. Morphological studies showed that there were in the snout three distinctive features: (1) a dorsal swelling in the pharynx, the Organ of Feuerwerk, consisting of brown adipose tissue with an extensive sympathetic innervation; (2) greatly enlarged lachrymonasal ducts, the Ducts of Kwentsch; and (3) asbestos deposits in the nasal skin, the Bestos Bodies. Physiological studies show that the Organ of Feuerwerk can, when the animal is excited, produce extremely high temperatures. We discuss how these mechanisms can produce steam and fire, and how the snout is protected. We also discuss and offer a solution to the problem of how, since dragons are invariably male, the species can be propagated.

In plain English

This 2002 article in Respiratory Physiology & Neurobiology is written as a spoof, not a genuine research report. Its subject is how dragons breathe fire and reproduce, and it reports that a lizard's throat heated up until the fire alarms went off after the authors' technician entered the room. It contains no information about asbestos exposure or disease in people. The authors described two specimens of a desert lizard, Lacerta pyrophorus, which they said came from London Zoo. One was killed and dissected. The other was anaesthetized, and a temperature probe was placed in a swelling in its throat. The authors reported that this swelling was brown fat with a rich nerve supply, that the snout had very large ducts, and that chemical analysis showed structures in the nasal skin to be asbestos. They reported that the throat temperature stayed at 35 to 38 degrees C for almost an hour and then rose. The authors speculated that the lizard turns sand rubbed into its skin into asbestos. They suggested it is closely related to the extinct dragon.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Humorous spoof article, presented as a dissection and physiology experiment on lizards together with a review of what is known about dragons
• Who was studied: Two living specimens of the desert lizard Lacerta pyrophorus, which the authors said were obtained from the London Zoo. The work was described as done at St. George's Hospital Medical School, London. No dates are given for the work.
• Exposure: No human or occupational asbestos exposure was studied. Asbestos was reported only as deposits found in the lizard's nasal skin ('Bestos Bodies'), identified by chemical analysis as Mg3Si2O5(OH)4. The article calls this 'asbestos' and does not name a fiber type.
• Main results:
  • In the lizard, a swelling in the back wall of the throat (the 'Organ of Feuerwerk') consisted of brown adipose tissue and had a copious sympathetic nerve supply.
  • Structures in the skin of the lizard's nostrils blunted microtome knives and were reported to be asbestos on chemical analysis.
  • In the anaesthetized lizard, the temperature of the throat organ stayed at 35 to 38 degrees C for almost 1 hour.
  • When the lizard woke and the technician entered, the organ's temperature began to rise, and after a further hour the fire alarms were set off.
• The authors' conclusion: The authors speculated that the lizard rubs sand into its nasal skin and converts it to asbestos. They suggested that L. pyrophorus is closely related to the extinct dragon.
• Limitations the authors state:
  • The authors did not trace where the large snout ducts began and ended.
  • The authors stated that their studies did not explain how fire, as opposed to steam, is produced.
  • The authors described their evidence as somewhat hypothetical.

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