Vocal Cords

Definition

The vocal cords, also known as the vocal folds, are two bands of elastic muscle tissue located within the larynx. They play a crucial role in the production of speech and vocalization by vibrating to create sound waves that are then shaped and amplified by the upper respiratory system.

5 Must Know Facts For Your Next Test

1. The vocal cords are composed of two layers: an outer layer of muscle tissue and an inner layer of mucous membrane.
2. The tension and position of the vocal cords can be adjusted by the intrinsic and extrinsic muscles of the larynx, allowing for the modulation of pitch and volume during speech.
3. The vocal cords are responsible for the production of different voice qualities, such as breathy, creaky, or modal voice, depending on the degree of tension and vibration.
4. The opening and closing of the vocal cords, controlled by the glottis, are essential for regulating airflow during speech, swallowing, and breathing.
5. Vocal cord pathologies, such as nodules, polyps, or paralysis, can lead to voice disorders and difficulties with speech and vocalization.

Review Questions

• Describe the role of the vocal cords in the production of speech and vocalization.
  • The vocal cords play a central role in the production of speech and vocalization. When air from the lungs passes through the glottis, the vocal cords vibrate, creating sound waves that are then shaped and amplified by the upper respiratory system. The tension and position of the vocal cords can be adjusted by the intrinsic and extrinsic muscles of the larynx, allowing for the modulation of pitch, volume, and voice quality during speech and vocalization.
• Explain how the structure and composition of the vocal cords contribute to their function.
  • The vocal cords are composed of two layers: an outer layer of muscle tissue and an inner layer of mucous membrane. This structure allows for the precise control and adjustment of the tension and position of the vocal cords, which is essential for producing a wide range of voice qualities and modulating pitch and volume during speech and vocalization. The ability to finely tune the vibration of the vocal cords is what enables the production of complex and nuanced vocal sounds.
• Analyze the importance of the glottis in regulating airflow during speech, swallowing, and breathing, and how this relates to the function of the vocal cords.
  • The glottis, the opening between the vocal cords, plays a critical role in regulating airflow during speech, swallowing, and breathing. The opening and closing of the glottis, controlled by the intrinsic muscles of the larynx, is essential for managing the airflow necessary for phonation, as well as for protecting the airway during swallowing and ensuring proper breathing patterns. The precise coordination between the vocal cords and the glottis is what allows the upper respiratory system to effectively produce speech, while also maintaining the essential functions of swallowing and breathing.

Related terms

Larynx:

The larynx, commonly referred to as the voice box, is the structure that houses the vocal cords and is responsible for producing sound during speech.

Phonation: Phonation is the process of producing vocal sound by the vibration of the vocal cords, which is the basis of speech and vocalization.

Glottis:

The glottis is the opening between the vocal cords, and the opening and closing of the glottis is essential for controlling the airflow during speech and vocalization.