Snoring, e.g., and a literal hint to what's hidden in 20-, 27- and 45-Across

The Origin of "Snoring"Snoring is a natural bodily function that occurs when the muscles in the throat relax, causing the airway to narrow and vibrate. This vibration produces the characteristic sound that we associate with snoring.Snoring is a common occurrence and can be influenced by various factors, including sleep position, weight, and nasal congestion.The Human NoseThe human nose is a complex and highly specialized organ that plays a crucial role in our sense of smell and overall health. It contains over 400 million olfactory receptors, which are responsible for detecting and interpreting the chemical makeup of different scents.The nasal passages are lined with mucous membranes that help to trap dust, pollen, and other particles, preventing them from entering the lungs.The SinusThe sinuses are small air-filled cavities located within the bones of the skull, including the ethmoid, frontal, and maxillary bones. They are responsible for producing mucus, which helps to trap dust and other particles, and also plays a role in the regulation of temperature and humidity.The paranasal sinuses are responsible for producing over 99% of the mucus in the human body.The EarThe ear is a complex and highly specialized organ that plays a crucial role in our sense of hearing and balance. It contains three small bones called ossicles, which transmit sound vibrations to the inner ear.The ear is responsible for detecting sound waves and transmitting them to the brain, where they are interpreted as sound.The LabyrinthThe labyrinth is a complex and highly specialized structure within the inner ear, responsible for detecting balance and equilibrium. It contains a network of tiny bones and fluid-filled compartments that work together to maintain our sense of balance.The labyrinth is responsible for detecting changes in gravity and spatial orientation.The EardrumThe eardrum, also known as the tympanic membrane, is a thin membrane that separates the ear canal from the middle ear cavity. It is responsible for transmitting sound vibrations to the inner ear.The eardrum is lined with mucous membranes that help to trap dust and other particles, preventing them from entering the ear.The CochleaThe cochlea is a spiral-shaped structure within the inner ear, responsible for detecting sound waves and transmitting them to the brain. It contains millions of hair cells that convert sound vibrations into electrical signals.The cochlea is responsible for detecting changes in frequency and amplitude.The Auditory NerveThe auditory nerve is a complex and highly specialized structure that carries electrical signals from the inner ear to the brain. It contains thousands of specialized cells that convert sound vibrations into neural signals.The auditory nerve is responsible for transmitting sound information to the brain, where it is interpreted as sound.45 AcrossThe word "Across" refers to a horizontal line or column.Across is a word that refers to something that is placed to the right or left of a center point.Across is a word that is often used to describe something that is symmetrical or balanced.Across is a word that is commonly used in puzzles and games to indicate a choice or direction.