An important component of the lamina propria in the upper respiratory system is

The mucus glands.

Explanation:

Lamina propria is the name of the connective tissue located in the upper respiratory system and the nose which is a part of the mucosa. The most important component of the lamina propria is the mucus glands.

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An important component of the lamina propria in the upper respiratory system is mucus glands.

Explanation:

Lamina propria is a part of mucosa conatining loose connective tissue and in the respiratory system, it has folllowing characteristics :

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."