ninasõõru

Ninasõõru refers to one of the two external openings of the nasal cavity. These structures are prominent features of the face in most vertebrates, playing a crucial role in olfaction and respiration. Each ninasõõru is lined with mucous membranes and contains hairs, known as vibrissae, which help filter inhaled air. The size and shape of ninasõõru can vary significantly between species and even individuals, influenced by evolutionary adaptations and genetic factors. In humans, the ninasõõru are typically separated by a septum, a wall of cartilage and bone. Their primary functions include allowing air to enter the respiratory system, warming and humidifying this air before it reaches the lungs, and trapping particulate matter and pathogens. Furthermore, the ninasõõru house the olfactory receptors responsible for the sense of smell, enabling the detection of various chemical compounds in the environment. Variations in ninasõõru can sometimes be associated with specific genetic conditions or developmental anomalies.