näköelimistön

Näköelimistö, also known as the visual system, refers to the sensory system responsible for vision. It is a complex network of organs and tissues that work together to detect and interpret light, allowing us to perceive the world around us. The primary organ of the näköelimistö is the eye. Within the eye, light enters through the cornea, passes through the pupil, and is focused by the lens onto the retina at the back of the eye. The retina contains specialized photoreceptor cells, rods and cones, which convert light into electrical signals. Rods are responsible for vision in low light conditions, while cones are responsible for color vision and sharp detail. These electrical signals are then transmitted through the optic nerve to the brain, specifically to the visual cortex in the occipital lobe. Here, the signals are processed and interpreted, forming the images we see. The näköelimistö also includes accessory structures such as the eyelids, eyelashes, and tear glands, which protect and lubricate the eye. Muscles surrounding the eyeball allow for eye movement, enabling us to track moving objects and focus on different distances. The intricate coordination of these components allows for the remarkable ability of sight.