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The diaphragm is shaped like an inverted "J" attaching anteriorly to the
xiphisternum (located at the vertebral level of T9) while posteriorly it
extends tot he vertebral level of T12 to encroach on the posterior
abdominal wall. Structures transmitted between the thorax and abdomen pass
via major and minor openings in the diaphragm. The major openings
primarily transmit structures between thoracic and abdominal cavities. The
minor openings (which are located around its periphery) primarily transmit
structures between thoracic and abdominal walls. |