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velum tongues lips and jaw which are collectively called as the articulators The process of shaping the vocal tract to produce different speech is called articulation The air flow from the lungs travels up the trachea a tube consisting of rings of cartilage and through the larynx toward the vocal tract The larynx acts as a gate between lungs

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drops down close to the tongue and almost meeting the upraised epiglottis below separates the mouth cavity more or less completely from the pharynx The inspired air therefore passes

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Human organs of speech

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Simple Columnar Epithelium The scale bar represents 20 micrometers giving you an idea of the size of a typical cell A micrometer is one millionth of a meter

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it across the skin surface The downside to this of course is that they rapidly lose water across their very thin skins and so must live in moist environments Simple Cuboidal Epithelium Simple Cuboidal Epithelium Lining the Kidney Tubules