LIFESCI 7C Chapter 36.4: Chapter 36.4
Document Summary
Opsin: a photosensitive protein that converts the energy of light photons into electrical signals in the receptor cell. Animals see the world through different types of eyes. Eyecup: an eye structure found in flatworms that contains photoreceptors that point up and to the left or right. Compound eye: an eye structure found in insects and crustaceans that consists of a number of ommatidia, individual light-focusing elements. Single-lens eyes: an eye structure found in vertebrates and cephalopod mollusks that works like a camera to produce a sharply defined image of the animal"s visual field. Ommatidia: individual light-focusing elements that make up the compound eyes of insects and crustaceans; the number of ommatidia determines the resolution of the image. The structure and function of the vertebrate eye underline image. Sclera: a tough, white outer layer surrounding the vertebrate eye. Choroid: a thinner layer that carries blood vessels to nourish the eye.
