Publication Date:
2010-11-13
Description:
Animals have developed a range of drinking strategies depending on physiological and environmental constraints. Vertebrates with incomplete cheeks use their tongue to drink; the most common example is the lapping of cats and dogs. We show that the domestic cat (Felis catus) laps by a subtle mechanism based on water adhesion to the dorsal side of the tongue. A combined experimental and theoretical analysis reveals that Felis catus exploits fluid inertia to defeat gravity and pull liquid into the mouth. This competition between inertia and gravity sets the lapping frequency and yields a prediction for the dependence of frequency on animal mass. Measurements of lapping frequency across the family Felidae support this prediction, which suggests that the lapping mechanism is conserved among felines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reis, Pedro M -- Jung, Sunghwan -- Aristoff, Jeffrey M -- Stocker, Roman -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1231-4. doi: 10.1126/science.1195421. Epub 2010 Nov 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Civil and Environmental Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21071630" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Biomechanical Phenomena
;
Cats/*physiology
;
Drinking/*physiology
;
Felidae/physiology
;
Gravitation
;
Models, Biological
;
Movement
;
Physical Processes
;
Tongue/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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