File:Skin African elephant.png
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English: Morphology of the African bush elephant’s (Loxodonta africana) skin. In addition to (a), (b) centimetre-scale wrinkles and folds, African elephants exhibit (c) a network of narrow (~100μm) channels (here, on the forehead of a juvenile animal). (d), (e) A patch of forehead skin before (d) and after (e) the mechanical extraction of the stratum corneum. In (e), the narrow channels (white dotted lines) are no longer visible because they are confined to the extracted skin layer; note that the stratum corneum channels are confined in between papillae. The circled hair on both pictures serve as guides to the eye. (f) Mesh generated from the data of a micro-CT scan of a patch of skin without stratum corneum and colour-coded by height, showing the intricate three-dimensional surface geometry of the animal’s papillae.(g) A patch of skin from the forehead of an Asian elephant. Even though the pattern of papillae is present, narrow channels are not observed. Scale bars: (a) ∼50 cm; (b) ∼7 cm; (c) 7.5 mm; (d) 2.5 mm; (e) 2.5 mm; (f) 1 mm; (g) 5mm
Deutsch: Morphologie der Haut des Afrikanischen Elefanten (Loxodonta africana). Zusätzlich zu den größeren Falten in (a), (b) zeigt der Afrikanische Elefant ein Netzwerk aus engen (~100μm) Kanälen (c) (hier am Kopf eines Jungtiers). (d), (e) Teil der Kopfhaut vor (d) und nach (e) der mechanischen Entfernung der obersten Schicht (stratum corneum). In (e) sind die engen Kanäle (weiße Punktlinien) nicht länger erkennbar, da sie zur äußeren Hautschicht gehören; Beachte, dass die Kanäle des stratum corneum zwischen Papillen einegschlossen sind, die eingekreisten Haare auf beiden Bildern dienen als Orientierungshilfe. (f) Darstellung eines Mikro-CT-Scans eines Hautstücks ohne Stratum Corneum, farbcodiert nach Höhe, mit Darstellung der komplexen dreidimensionale Oberflächengeometrie der Papillen. (g) Hautteil vom Kopf des Asiatischen Elefanten mit ebensolchen Papillen, aber ohne den Kanälen. Maßstäbe: (a) ∼50 cm; (b) ∼7 cm; (c) 7.5 mm; (d) 2.5 mm; (e) 2.5 mm; (f) 1 mm; (g) 5mm |
| Source | António F. Martins, Nigel C. Bennett, Sylvie Clavel, Herman Groenewald, Sean Hensman, Stefan Hoby, Antoine Joris, Paul R. Manger and Michel C. Milinkovitch: Locally-curved geometry generates bending cracks in the African elephant skin. Nature Communications 9, 2018, S. 3865, doi:10.1038/s41467-018-06257-3 |
| Author | António F. Martins, Nigel C. Bennett, Sylvie Clavel, Herman Groenewald, Sean Hensman, Stefan Hoby, Antoine Joris, Paul R. Manger and Michel C. Milinkovitch |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 19:48, 27 March 2019 | | 900 × 675 (1.18 MB) | DagdaMor (talk | contribs) | {{Information |description ={{en|1=Morphology of the African bush elephant’s (''Loxodonta africana'') skin. In addition to (a), (b) centimetre-scale wrinkles and folds, African elephants exhibit (c) a network of narrow (~100μm) channels (here, on the forehead of a juvenile animal). (d), (e) A patch of forehead skin before (d) and after (e) the mechanical extraction of the stratum corneum. In (e), the narrow channels (white dotted lines) are no longer visible because they are confined to the... |
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