Show simple item record Kleinteich, Thomas Gorb, Stanislav N. 2015-09-08T17:38:49Z 2015-09-08T17:38:49Z 2015-09-29
dc.identifier doi:10.5061/dryad.066mr
dc.identifier.citation Kleinteich T, Gorb SN (2015) Frog tongue acts as muscle-powered adhesive tape. Royal Society Open Science 2: 150333.
dc.description Frogs are well known to capture fast-moving prey by flicking their sticky tongues out of the mouth. This tongue projection behaviour happens extremely fast which makes frog tongues a biological high-speed adhesive system. The processes at the interface between tongue and prey, and thus the mechanism of adhesion, however, are completely unknown. Here, we captured the contact mechanics of frog tongues by filming tongue adhesion at 2000 frames per second through an illuminated glass. We found that the tongue rolls over the target during attachment. However, during the pulling phase, the tongue retractor muscle acts perpendicular to the target surface and thus prevents peeling during tongue retraction. When the tongue detaches, mucus fibrils form between the tongue and the target. Fibrils commonly occur in pressure- sensitive adhesives, and thus frog tongues might be a biological analogue to these engineered materials. The fibrils in frog tongues are related to the presence of microscopic papillae on the surface. Together with a layer of nanoscale fibres underneath the tongue epithelium, these surface papillae will make the tongue adaptable to asperities. For the first time, to the best of our knowledge, we are able to integrate anatomy and function to explain the processes during adhesion in frog tongues.
dc.relation.haspart doi:10.5061/dryad.066mr/1
dc.relation.haspart doi:10.5061/dryad.066mr/2
dc.relation.haspart doi:10.5061/dryad.066mr/3
dc.relation.isreferencedby doi:10.1098/rsos.150333
dc.relation.isreferencedby PMID:26473054
dc.subject Adhesion
dc.subject Biomaterials
dc.subject Feeding
dc.subject Amphibians
dc.subject Biomechanics
dc.title Data from: Frog tongue acts as muscle-powered adhesive tape
dc.type Article
dwc.ScientificName Ceratophrys ornata
prism.publicationName Royal Society Open Science

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Title Micro-CT scan of an isolated tongue of Ceratophrys ornata
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Description This file contains the raw micro-CT data of the tongue in a female ornate horned frog Ceratophrys ornata. The specimen had a snout-vent-length of 70mm. To be able to identify soft tissue structures in the specimen, the animal was treated with Lugol's iodine potassium iodide solution.
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Title Micro-CT scan of Ceratophrys ornata tongue tissue
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Description Micro-CT scan of a piece of tongue tissue of the ornate horned frog Ceratophrys ornata. This piece was cut out from the tongue of the specimen after the animal was treated with Lugol's solution to allow for soft tissue visualization.
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Title Micro-CT scan of the head of Ceratophrys ornata
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Description This is a micro-CT scan of the head of a 70mm female Ceratophrys ornata. The specimen was submerged in Lugol's iodine potassium iodide solution so that cranial muscles and other soft tissue structures are visible.
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