Cats whisker, SEM
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Cats whisker, SEM
Cats whisker. Coloured scanning electron micrograph (SEM) of a cats whisker, or vibrissa. Whiskers are the thickened hairs that grow out of a cats face. Like all hair they are made up of dead cells containing the protein keratin. However, unlike other hairs, their follicle is surrounded by a capsule of blood, called a blood sinus, which is itself surrounded by nerves. When a whisker is moved, some of the blood in the sinus is displaced. This greatly amplifies the message sent to the nerves and allows even small changes in air pressure to be detected. This sensitivity allows a cat to detect the movement of prey in the dark. Magnification: x2800 when printed at 10 centimetres wide
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6451557
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Animal Body Blue Dead Facial Feline Hair Keratin Scale Scales Scaly Sensitive Sensory Whisker Appendage Vibrissa
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