Human head and neck Iris sphincter muscle

Cornea, then passes through the lensCornea, then passes through the lens
When light strikes the sensitive “film”, the retina in the back of the eye, an electrical disturbance is created out of a chemical change, and is transmitted to the brain. Iris sphincter muscle
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Chapterninetee n content ReviewChapterninetee n content Review
Baroreceptors detect changes in pressure within body structures, as when receptors alert us to an expanding bladder and the need to evacuate it. Nociceptors respond to pain as a result of tissue damage. Iris sphincter muscle
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