Definition: The term "alveolate" comes from Greek, which means "to close or cover." In its most basic meaning, a "alveolate" is defined as a small cavity (an alveolus) in the lungs that allows air to circulate freely around the walls of the lung. This allows for a more efficient exchange of gases between the lungs and the bloodstream. Here’s some more detailed information about "alveolate": - An alveolar sac: A type of alveolus is called an alveolar sac. These are tiny spaces filled with air (oxygen) and water (carbon dioxide). The walls of these cavities are called capillaries, which contain blood vessels. - Alveolar lung: In a person's lungs, the small air-filled spaces (alveoli), located within the alveolar sacs, are called "lungs." - Alveolar capacity: This is the volume of air that can be exhaled from a person's lungs per minute. For example, an alveolar capacity of 100 mL (liter) means that one person can exhale up to 100 liters of air each minute. - Alveolus: In a lung, an alveolus is the smallest lung sac in the lungs. It has a very small diameter compared to other alveoli and is called "small" because it's smaller than other alveoli but still capable of supporting a significant volume of air. In summary, an "alveolate" refers to a small cavity or space within a lung that allows air circulation throughout the lungs, allowing for efficient exchange of gases.
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