The silica-phellem block and stomate tubercle on 3rd leaf are underdeveloped, the tubercle of stomate block is small and dense in japonica, big and sparse in O.
The tongue is covered with a series of cone-shaped small projections called papillae in which there are taste buds that can sense flavors, such as sweet, bitter, salty, and sour.
Papillae were only a little longer in lions than in cats, noted Noel and David Hu, an associate professor at Georgia Tech. Their findings were published in Proceedings of the National Academy of Sciences.
And then we look in a little more detail, you can see the individual papillae come up, and there are little ridges on there, so it's a papilla on papilla and so forth.
So there are 25 million color organs called " chromatophores" in the skin, and all those bumps out there, which we call " papillae, " and they're all neurally controlled and can change instantaneously.