The nose is a crucial part of the respiratory system. It warms, filters, and moistens air, and helps detect and identify different scents. The nose also has a role in the sense of taste, producing mucus to enhance flavor. The nose is capable of detecting over 1 trillion different scents. It also plays a crucial role in our ability to taste, as it helps filter and identify flavors. The shape and size of our nose is determined by the bones and cartilage, and can vary greatly between individuals.