brain, a part of the body that receives and responds to signals from the senses and also stores memories, cornea, the clear layer in front of the eye that acts as a lens, experiment, a test used to discover new information about a question, eye, a part of the body that detects light and sends signals to the brain, function, what something does, iris, the colored part of the eye that is shaped like a donut, lens, a clear object that changes the direction of light as it passes through, light, energy that comes from sources like the sun and lamps and makes it possible to see things, model, a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with, pupil, the dark opening in the center of the eye, retina, the back of the eye that senses light and sends messages to the brain, structure, the specific form and shape of something, vision, the ability to see

Human Machine: Lesson 2

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