stretch receptors called bulbous corpuscles (Ruffini corpuscles). Plexuses of nerves around hair follicles will detect hair movement. Stretch receptors and other somatosensory receptors are also found in joints and muscles. In skeletal muscle, the stretch receptor that does this is called a muscle spindle. The same thing in tendons is called a Golgi tendon organ. There are also bulbous corpuscles seen in joint capsules that measure the amount of stretch inside the joint itself.
VISION Vision is a special sense that relies on the transduction of light stimuli received through the eyes. There are two eyes inside bony orbits that result in binocular vision. The eyelids are present to help protect the eye from abrasions and the eyelashes help filter dust away from the eyes. The palpebral conjunctiva is the inner lining of the eyelids. It extends back onto the white part of the eye (which is called the sclera). Figure 73 illustrates the anatomy of the eye:
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