The human body is a complex and intricate system, made up of numerous parts that work together to keep us alive and healthy. One of the most important parts of this system is the respiratory system, which is responsible for breathing and oxygenating the blood. Within the respiratory system, there are tiny structures called alveolae, which play a crucial role in the exchange of gases between the lungs and the bloodstream.
Definitions
Alveolae (singular: alveolus) are small, hollow sacs located within the lungs. They are lined with a thin layer of cells called alveolar epithelium, which allows for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream. Alveolae are also known as air sacs, and they are the site of gas exchange during respiration.
Origin
The word “alveolae” comes from the Latin word “alveolus,” which means “little cavity” or “small hollow.” The term was first used in the context of anatomy in the 17th century by the Dutch anatomist Frederik Ruysch.
Meaning in different dictionaries
The meaning of alveolae is fairly consistent across different dictionaries. The Merriam-Webster dictionary defines alveolae as “a small cavity or sac in an organ or tissue, especially in the lungs.” The Oxford English Dictionary defines alveolae as “a small cavity or hollow space, especially one in the lung where gas exchange takes place.”
Associations
Alveolae are closely associated with the respiratory system, and they play a vital role in the exchange of gases between the lungs and the bloodstream. They are also associated with various respiratory diseases, such as emphysema and chronic bronchitis, which can damage the alveolar walls and reduce their ability to function properly.
Synonyms
Some synonyms for alveolae include air sacs, pulmonary sacs, and lung cavities.
Antonyms
There are no direct antonyms for alveolae, as they are a unique structure within the respiratory system.
The same root words
The root word “alveolus” appears in other medical terms, such as “alveolar bone” (the bone that supports the teeth) and “alveolar rhabdomyosarcoma” (a type of cancer that affects the muscles).
Example Sentences
- The alveolae are responsible for the exchange of oxygen and carbon dioxide during respiration.
- Chronic bronchitis can cause damage to the alveolar walls, reducing their ability to function properly.
- Emphysema is a respiratory disease that causes the alveolae to lose their elasticity and become less efficient at exchanging gases.
- The alveolar bone is an important part of the dental anatomy, providing support for the teeth.
- Alveolar rhabdomyosarcoma is a rare and aggressive form of cancer that can affect the muscles.