This document discusses speech organs and the classification of consonant sounds based on their place and manner of articulation. It describes bilabial, labiodental, dental, alveolar, palatal, velar, and glottal consonants formed using different parts of the mouth. Stops, fricatives, affricates, nasals, liquids, glides, and the glottal stop are explained as manners of articulation. Examples are provided to illustrate each type of consonant sound.