What is the definition of 'naris'?

The term 'naris' specifically refers to one of the two openings of the nose, commonly known as a nostril. This anatomical term is derived from Latin, where 'narēs' is the plural form. In human anatomy, the nostrils are essential for the respiratory system as they allow air to enter and exit the nasal cavity, playing a crucial role in breathing and olfactory functions. The other options represent different anatomical structures: a nerve is part of the nervous system, the kidney is an organ in the urinary system, and skin is the largest organ of the human body, serving various functions, including protection and regulation. Understanding the precise definitions and roles of these terms is important for success in medical terminology and anatomy.