ninasõõrmede

Ninasõõrmed are the two external openings of the nasal cavity. They are part of the respiratory system and play a crucial role in breathing. Air enters the body through the ninasõõrmed, where it is filtered, warmed, and humidified before proceeding to the lungs. The inner lining of the ninasõõrmed is covered in fine hairs called cilia and mucus-producing cells. The cilia help trap dust, pollen, and other airborne particles, preventing them from entering the respiratory tract. Mucus acts as a sticky barrier, further capturing irritants and pathogens.

The shape and size of ninasõõrmed can vary between individuals and species. In humans, they are typically oval-shaped and positioned on the nose. The septum, a wall of cartilage and bone, divides the nasal cavity into two separate passages, each with its own ninasõõrmed. The presence of ninasõõrmed is essential for olfaction, the sense of smell, as airborne molecules must pass through them to reach the olfactory receptors located higher up in the nasal cavity. Problems with ninasõõrmed, such as blockages or inflammation, can significantly impact breathing and the sense of smell.