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Question: 1 / 495

How can the human diaphragm be described?

The muscle that protects the entrance to the larynx

The location in the lungs where the diffusion of respiratory gases occurs

The muscular sheet that assists in the mechanics of breathing

The diaphragm is a crucial anatomical structure that plays a significant role in the mechanics of breathing. It is a thin, muscular sheet located at the base of the thoracic cavity, separating the thoracic cavity from the abdominal cavity. During inhalation, the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity and thereby reducing pressure in the lungs. This pressure difference allows air to be drawn into the lungs efficiently. Conversely, when the diaphragm relaxes, it moves upward, helping to expel air from the lungs during exhalation. Understanding this function illustrates why the diaphragm is essential for respiratory mechanics and why it is accurately described as the muscular sheet that assists in the mechanics of breathing.

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The tube down which air passes on its way to the lungs

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