MICROANATOMY

Detailed explanation-1: -The nose. The nose is the only part of the respiratory system that is visible externally and is the route for air entry into the respiratory system.

Detailed explanation-2: -Nostrils – Also known as nares, these are the openings that lead to your nasal cavities. The nostrils are visible on the face.

Detailed explanation-3: -Lateral walls (outer walls): The outer walls of your nose are made of cartilage and covered in skin. The walls form your nasal cavities and your nostrils.

Detailed explanation-4: -The NASAL CAVITY (nose) is the best entrance for outside air into your respiratory system. The hairs that line the inside wall are part of the air-cleansing system. Air can also enters through your ORAL CAVITY (mouth), especially if you have a mouth-breathing habit or your nasal passages may be temporarily blocked.