Light transmission and refraction
Blood supply, pigment prevents reflection
Ciliary body, iris
Accommodation; controls light intensity
Photoreception, impulse transmission
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.