Muscular wall separating the abdominal and thoracic cavities

diaphragm

Explanation:

Diaphragm (Anatomy) Wide muscle located between the pectoral and abdominal cavities and that has an important role in the breathing of mammals. Of all the muscles of the body, it is undoubtedly the one that has a more complex and convoluted anatomy that together with its position between the thorax and the abdomen and the fact that one of its ends (origin or insertion in this case matters less) It is completely mobile without having a stable fixed point as almost every muscle in the body. It has an umbrella shape and is located transversely to the longitudinal axis of the body forming a division between thoracic and abdominal cavity

The diaphragm is inserted at many points at the level of the ribcage; At the periphery level, the muscle is inserted into:

- The xiphoid process of the sternum.

- The rib edges of the chest wall.

- The ends of the eleventh and twelfth rib.

- Ligaments that extend through the posterior abdominal wall.

- The lumbar vertebrae using two pillars, the right in the body of L1-L4 and the left in L1-L3.

Seen from the mid-sagittal plane, it takes a curved shape, starting its curvature from the xiphoid, near the height of the 8th to 9th thoracic vertebra, until its insertion in the middle arcuate ligament, which, before the aorta at the level of the 12th thoracic vertebra.

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