Here's a breakdown of the main parts involved in speech production:
Respiratory System:
* Lungs: Provide the airflow needed to create sound.
* Diaphragm: Muscle that helps control airflow from the lungs.
Phonation System:
* Larynx (Voice Box): Contains the vocal cords, which vibrate to create sound.
Articulation System:
* Pharynx: Connects the larynx to the mouth and nose.
* Oral Cavity (Mouth): Includes the tongue, teeth, and palate.
* Nasal Cavity: Passageway for airflow through the nose.
Additional Structures:
* Hard Palate: Roof of the mouth.
* Soft Palate (Velum): Soft tissue at the back of the roof of the mouth, helps direct airflow to the nose or mouth.
* Uvula: Small, fleshy projection hanging from the soft palate.
Therefore, there is no designated "eighth part" of the speech organ. It's more accurate to consider the intricate interaction of these various components working together to produce speech.