Abstract:
:The cat tongue is covered in sharp, rear-facing spines called papillae, the precise function of which is a mystery. In this combined experimental and theoretical study, we use high-speed film, grooming force measurements, and computed tomography (CT) scanning to elucidate the mechanism by which papillae are used to groom fur. We examine the tongues of six species of cats from domestic cat to lion, spanning 30-fold in body weight. The papillae of these cats each feature a hollow cavity at the tip that spontaneously wicks saliva from the mouth and then releases it onto hairs. The unique shape of the cat's papillae may inspire ways to clean complex hairy surfaces. We demonstrate one such application with the tongue-inspired grooming (TIGR) brush, which incorporates 3D-printed cat papillae into a silicone substrate. The TIGR brush experiences lower grooming forces than a normal hairbrush and is easier to clean.
journal_name
Proc Natl Acad Sci U S Aauthors
Noel AC,Hu DLdoi
10.1073/pnas.1809544115subject
Has Abstractpub_date
2018-12-04 00:00:00pages
12377-12382issue
49eissn
0027-8424issn
1091-6490pii
1809544115journal_volume
115pub_type
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