What is the anatomy of a dog's nostrils and how does it contribute to their sense of smell?
A dog's nostrils are lined with specialized cells called olfactory receptors that detect scent molecules in the air. These receptors send signals to the brain, allowing the dog to interpret and identify different smells. The size and shape of a dog's nostrils help them to efficiently take in and process a wide range of scents, enhancing their sense of smell.