Larynx (with Vocal Folds) Quiz - Free Printable

Problem Description:

The image shows two diagrams of the vocal folds in different positions:
1. Closed position (closed glottis): The vocal folds are brought together, closing the airway.
2. Open position (open glottis): The vocal folds are separated, allowing air to pass through.

The task is to label the parts of the vocal folds and explain the function of each position.

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Solution:

#### Step 1: Understanding the Vocal Folds
The vocal folds (also known as vocal cords) are a pair of mucous membranes located in the larynx (voice box). They play a crucial role in producing sound by vibrating when air passes through them. The space between the vocal folds is called the glottis.

- Closed Glottis: When the vocal folds are closed, the glottis is shut, preventing air from passing through. This position is important for certain sounds and can also be used to hold one's breath.
- Open Glottis: When the vocal folds are open, the glottis is wide, allowing air to flow freely. This position is essential for breathing and producing certain types of sounds.

#### Step 2: Labeling the Diagrams
Below are the labels for the parts shown in the diagrams:

1. Epiglottis: A flap of tissue that covers the trachea during swallowing to prevent food or liquid from entering the lungs.
2. Vocal Folds (Cords): The primary structures responsible for sound production. They vibrate when air passes through them.
3. Glottis: The opening between the vocal folds. It can be closed or open depending on the position of the vocal folds.
4. Trachea: The windpipe that connects the larynx to the lungs.
5. Larynx: The voice box, which houses the vocal folds and other structures involved in sound production and breathing.

#### Step 3: Explaining the Positions

##### (a) Vocal Folds in Closed Position; Closed Glottis
- In this position, the vocal folds are brought together, completely closing the glottis.
- Function:
- Prevents air from passing through the vocal folds.
- Used during certain speech sounds (e.g., voiced stops like /b/, /d/, /g/).
- Helps in holding one's breath or generating high pressure in the lungs for forceful exhalation.

##### (b) Vocal Folds in Open Position; Open Glottis
- In this position, the vocal folds are separated, leaving the glottis wide open.
- Function:
- Allows air to pass freely through the vocal folds.
- Used during breathing and for producing unvoiced sounds (e.g., /p/, /t/, /k/).
- Facilitates deep inhalation and exhalation.

#### Step 4: Summary
- The closed glottis (vocal folds closed) is used for sound production and controlling airflow.
- The open glottis (vocal folds open) is used for breathing and producing unvoiced sounds.

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Final Answer:

The labeled parts and their functions are as follows:

1. Epiglottis: Covers the trachea during swallowing.
2. Vocal Folds (Cords): Produce sound by vibrating when air passes through.
3. Glottis: The opening between the vocal folds, which can be closed or open.
4. Trachea: The windpipe connecting the larynx to the lungs.
5. Larynx: Houses the vocal folds and other structures for sound production and breathing.

- Closed Glottis: Vocal folds are closed, preventing air passage. Used for voiced sounds and breath control.
- Open Glottis: Vocal folds are open, allowing free airflow. Used for breathing and unvoiced sounds.

Boxed Final Answer:
\[
\boxed{
\text{Labels: Epiglottis, Vocal Folds, Glottis, Trachea, Larynx; Functions explained above.}
}
\]