The central tendon of the diaphragm is a vital part of the human respiratory system, and its spelling in English can be challenging for some. The correct spelling is /ˈsɛntrəl ˈtɛndən əv ðiˈæfræm/, as per the International Phonetic Alphabet (IPA). This transcription shows that the word is pronounced as "SEN-truhl TEN-duhn UHV dahy-uh-fram." Accurate spelling of medical terms is essential to ensure clarity and precision in communication between doctors, nurses, and other healthcare professionals.
The central tendon of the diaphragm is a flat, sheet-like structure located at the level of the thoracic outlet, mainly serving as the central and posterior attachment point for the diaphragm muscle. The diaphragm, which is the primary muscle responsible for inhalation, is a dome-shaped, muscular partition that separates the thoracic and abdominal cavities.
The central tendon is formed by three main leaflets: the left, right, and posterior leaflets. The left and right leaflets are made up of tendinous fibers originating from the lumbar vertebrae, while the posterior leaflet is primarily formed from muscular fibers originating from the pericardium. The tendon has a fibrous and connective tissue composition, providing strength and stability to the diaphragm.
As the diaphragm contracts during inhalation, the central tendon moves downwards, thereby increasing the volume of the thoracic cavity. This action creates a negative pressure gradient, causing air to be drawn into the lungs. Conversely, during exhalation, the central tendon relaxes and returns to its original position, reducing the volume of the thoracic cavity and allowing air to be expelled from the lungs.
The central tendon of the diaphragm plays a crucial role in the process of respiration and is an integral part of the diaphragm muscle. Its anatomical location and composition contribute to the effective functioning of the diaphragm in facilitating the exchange of oxygen and carbon dioxide in the body.
Tendo cordiformis, centrum tendineum.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.