45 citations,
April 2009 in “Journal of anatomy” Cat claws stay sharp by shedding their outer layer through microcracks formed during activities.
1 citations,
October 2013 Different ectodermal organs like hair and feathers regenerate differently, with specific stem cells and signals involved in their growth and response to the environment.
113 citations,
March 2018 in “Biological reviews/Biological reviews of the Cambridge Philosophical Society” Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.
65 citations,
March 2018 in “Journal of Dermatological Science” Skin problems can be caused or worsened by physical forces and pressure on the skin.
17 citations,
June 2012 in “Journal of experimental zoology. Part B, Molecular and developmental evolution” Hair in mammals likely evolved from glandular structures, not scales.