Angioarchitectural structure of the fungiform papillae on rabbit tongue anterodorsal surface

K Ojima1, T Takahashi, S Matsumoto

  • 1Department of Physiology, School of Dentistry at Tokyo, Nippon Dental University, Japan.

Insights

Rabbit tongue fungiform papillae (FuP) have unique flower-like microvascular structures. These structures, with 8-12 petals, enhance surface area for taste perception.

Area of Science:

  • Morphology and vascular anatomy
  • Sensory organ research
  • Comparative histology

Background:

  • Fungiform papillae (FuP) are key taste structures on the tongue.
  • Understanding their microvascular morphology is crucial for taste function.
  • Previous studies have not fully detailed FuP microvascular casting.

Purpose of the Study:

  • To examine and compare the microvascular cast specimens (MVCS) of rabbit fungiform papillae (FuP).
  • To correlate functional and morphological characteristics with positional differences.
  • To classify FuP based on their microvascular structure.

Main Methods:

  • Scanning electron microscopy (SEM) was used to analyze MVCS of FuP.
  • Microvascular casts of FuP on the antero-dorsal surface of rabbit tongues were prepared.
  • Morphological characteristics, including petal number and shape, were documented.

Main Results:

  • FuPs are sporadically distributed among smaller filiform papillae (SfP) on the rabbit tongue.
  • FuPs exhibit flower-like configurations with 8-12 'petals' formed by capillary loops.
  • FuPs are larger and morphologically more complex than SfPs, with three distinct types identified based on petal number.

Conclusions:

  • The petal-like structures of FuP microvasculature increase surface area.
  • This increased surface area likely enhances the reception of taste stimuli.
  • SEM analysis of MVCS provides detailed insights into FuP morphology and function.

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