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The thoracic diaphragm, or simply the diaphragm (/ ˈ d aɪ ə f r æ m /; [1] Ancient Greek: διάφραγμα, romanized: diáphragma, lit. 'partition'), is a sheet of internal skeletal muscle [ 2 ] in humans and other mammals that extends across the bottom of the thoracic cavity .
Diaphragm (optics), a stop in the light path of a lens, having an aperture that regulates the amount of light that passes; Diaphragm (acoustics), a thin, semi-rigid membrane that vibrates to produce or transmit sound waves; Diaphragm (birth control), a small rubber dome placed in the vagina to wall off the cervix, thus preventing sperm from ...
In mechanics, a diaphragm is a sheet of a semi-flexible material anchored at its periphery and most often round in shape. It serves either as a barrier between two chambers, moving slightly up into one chamber or down into the other depending on differences in pressure , or as a device that vibrates when certain frequencies are applied to it.
The diaphragm is a barrier method of birth control. [3] It is moderately effective, with a one-year failure rate of around 12% with typical use. [4] It is placed over the cervix with spermicide before sex and left in place for at least six hours after sex.
The crus of diaphragm (pl.: crura), refers to one of two tendinous structures that extends below the diaphragm to the vertebral column. There is a right crus and a left crus, which together form a tether for muscular contraction. They take their name from their leg-shaped appearance – crus meaning leg in Latin.
Pages in category "Thoracic diaphragm" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
The centre of the diaphragm's aperture coincides with the optical axis of the lens system. Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris. See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the ...
In a phonograph reproducer, the diaphragm is a flat disk of typically mica or isinglass that converts the mechanical vibration imparted on the buttress from the recorded groove into sound. In the case of acoustic recording the reproducer converts the sound into the motion of the needle that scribes the groove on the recording media.