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Definitions:

Nasopharynx

The upper part of the throat that connects the nasal cavities to the throat, playing a crucial role in respiration and vocalization.

Uvula

The fleshy extension at the back of the soft palate that hangs above the throat, playing a role in speech and swallowing.

Chemical Mediators

are substances released from cells that trigger or regulate biochemical pathways, often involved in inflammation and immune responses.

Blood PH

The measure of the acidity or alkalinity of blood, maintained within a tightly controlled range of about 7.35 to 7.45 to ensure proper cellular function.