Cricoid cartilage: A ring of hyaline cartilage that forms the inferior wall of the larynx. It is attached to the top of the trachea. The median cricothyroid ligament connects the cricoid cartilage to the thyroid cartilage. Epiglottis: A large, spoon-shaped piece of elastic cartilage. During swallowing, the pharynx and larynx rise. Elevation of the pharynx widens it to receive food and drink; elevation of the larynx causes the epiglottis to move down and form a lid over the glottis, closing it off.Paired cartilages:

Arytenoid cartilages: Of the paired cartilages, the arytenoid cartilages are the most important because they influence the position and tension of the vocal cords. These are triangular pieces of mostly hyaline cartilage located at the posterosuperior border of the cricoid cartilage. Corniculate cartilages: Horn-shaped pieces of elastic cartilage located at the apex of each arytenoid cartilage. Cuneiform cartilages: Club-shaped pieces of elastic cartilage located anterior to the corniculate cartilages. Muscles
The muscles of the larynx are divided into intrinsic and extrinsic muscles. The extrinsic muscles act on the region and pass between the larynx and parts around it but have their origin elsewhere; the intrinsic muscles are confined entirely within the larynx and have their origin and insertion there.The intrinsic muscles are divided into respiratory and the phonatory muscles (the muscles of phonation). The respiratory muscles move the vocal cords apart and serve breathing. The phonatory muscles move the vocal cords together and serve the production of voice. The main respiratory muscles are the posterior cricoarytenoid muscles.
In addition, governments often regulate industry, especially mines, to limit how much dust is in the air. In the United States, coal miners injured by pneumoconiosis and their families may receive monthly payments and medical benefits under the Black Lung Benefits Act. See also
Aluminosis
Black Lung Benefits Act of 1972
Chalicosis
Philip DArcy Hart
Pneumonoultramicroscopicsilicovolcanoconiosis
Popcorn workers lung disease — diacetyl emissions and airborne dust from butter flavorings used in microwave popcorn production

References
Further reading
Cochrane, A.L. ; Blythe, M. (1989). One Mans Medicine, an autobiography of Professor Archie Cochrane. London: BMJ Books. ISBN 0727902776. (Paperback ed. (2009) Cardiff University ISBN 0954088433. External links

"Pneumoconioses". NIOSH Safety and Health Topic. Center for Disease Control. 30 March 2022. "Black Lung Benefits Act". U.S. Department of Labor. Archived from the original on 2010-05-27. Retrieved 2007-03-02. Coal Workers Pneumoconiosis at Merck Manual of Diagnosis and Therapy Professional Edition
Black Lung — United Mine Workers of America
"Black Lung" (PDF). U.S. Department of Labor Mine Safety and Health Administration. Archived from the original (PDF) on 2010-05-30. A Conversation about Mining and Black Lung Disease
Flavorings-Related Lung Disease
The Institute of Occupational Medicine and its research into pneumocomiosis
Miller, B.G. ; Kinnear, A.G. Pneumoconiosis in coalminers and exposure to dust of variable quartz content (PDF) (Technical report). Institute of Occupational Medicine. TM/88/17.