Sense organs: eye, ear and nose

In short: Sense organs convert stimuli from the environment into electrical signals that the brain processes. These include sight, hearing, smell, taste and touch.

In more detail: The brain “constructs” our picture of the world from the signals.

In detail

• Eye: Light falls through the cornea and lens onto the retina with rods (light-dark) and cones (colours).
• Vision defects: Short-sightedness, long-sightedness; glasses or contact lenses compensate for them.
• Ear: Sound waves move the eardrum, ossicles and cochlea; the inner ear also holds the sense of balance (gehoerschutz-und-lautstaerke).
• Nose: Olfactory cells detect scent molecules; smell also influences taste.
• Tongue: Sweet, sour, salty, bitter, umami.
• Skin: Pressure, temperature, pain.
• Illusions: Optical illusions show how the brain interprets (gehirn-aufbau-und-neuroplastizitaet).
• Prevention: Eye doctor and hearing test at intervals; screen breaks (augen-und-bildschirm-digitale-augenbelastung-vorbeugen).