Question

The nose is the first structure of the conducting passageway for inhaled air; it is formed by bone, hyaline cartilage, and dense irregular connective tissue covered with skin externally.

1. Paired nasal bones form the bridge of the nose and support it superiorly.

2. Anteroinferiorly from the bridge, there is one pair of lateral cartilages and there are two pairs of alar cartilages.

3. The flared components of the nose are composed of dense irregular connective tissue. The paired nostrils are the anterior openings that lead into the nasal cavity.

Answer 1

The external nose includes the nasal bone and cartilages, shaping the nose's appearance and aiding its functions, such as warming and moistening air. The nasal cavity is divided by the nasal septum and contains conchae that condition inhaled air.

Step-by-step explanation:

The external nose is comprised of various structures that contribute to its appearance and functionality. These include the nasal bone, which forms the bony base or bridge of the nose. The root of the nose sits between the eyebrows, while the bridge connects the root to the rest of the nose, which is the dorsum nasi. The apex, or the tip of the nose, is supported laterally by alar cartilages, contributing to the formation of the nostrils. The nostrils themselves are referred to as nares, which open into the nasal cavity.

The internal aspects of the nasal cavity feature the nasal septum and nasal conchae. The nasal septum, which separates the left and right nasal cavities, is formed anteriorly by the septal cartilage, and posteriorly by the perpendicular plate of the ethmoid bone and the vomer bone. The nasal cavity also contains three bony projections on each lateral wall: the superior, middle, and inferior nasal conchae. These structures function to warm and moisten incoming air as well as trap dust and pathogens.