NEET BIOLOGY

Detailed explanation-1: -The mucous membrane lining the trachea consists of pseudostratified ciliated columnar epithelium with numerous goblet cells. The mucous produced by the goblet cells traps inhaled particles and the cilia move the mucous and particle to the larynx, from which they enter the pharynx and are swallowed or spit out.

Detailed explanation-2: -The pseudostratified columnar epithelium helps in the secretion of mucus, protection of the respiratory tract and the inner ear from the foreign particles, absorption of the excess fluid, and the transport of the substances (such as enzymes, hormones, sperms).

Detailed explanation-3: -The presence of pseudostratified columnar epithelium in the upper respiratory tract (composed of the nose, trachea and bronchi) protects the lungs from these irritants. Goblet cells of the epithelium secrete mucus to trap particles and prevent them from traveling further down respiratory passages.

Detailed explanation-4: -The conducting passageways of the respiratory system (nasal cavity, trachea, bronchi and bronchioles) are lined by pseudostratified columnar epithelial tissue, which is ciliated and which includes mucus-secreting goblet cells.

Detailed explanation-5: -Ciliated pseudostratified columnar epithelia is the type of respiratory epithelium found in the linings of the trachea as well as other respiratory tract, which allows filtering and humidification of incoming air.