British shorthair cat hair surface /10kV/ETD
As can be seen from the scanning electron microscope image, its surface has an obvious wavy structure. The same surface structural units are the hair of dogs, roe deer, cows, and donkeys. Their diameters are generally between 20 and 60 μm. The width of the wavy unit is almost transverse to the entire circumference of the hair shaft, and the axial distance between each wavy unit is about 5 μm. The diameter of the British shorthair cat hair in the picture is about 58 μm. After zooming in, you can also see the surface hair scale structure. The width of the scales is about 5 μm, and the aspect ratio is about 12:1. The aspect ratio of the corrugated unit structure is small, and the aspect ratio is related to the flexibility of the hair. The larger the aspect ratio, the better the softness of the hair, and its stiffness is not easy to break. There is a certain gap between the hair scales and the hair shaft. A larger gap can store air, slow down the air flow speed, and reduce the heat exchange speed. Therefore, different surface unit shapes also determine the difference in thermal insulation performance.
