Which is part of the origin of the diaphragm?

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Multiple Choice

Which is part of the origin of the diaphragm?

Explanation:
The diaphragmatic muscle fibers arise from the inner surfaces of the lower six ribs and their costal cartilages, forming the costal portion of the diaphragm. The central tendon is a central aponeurosis that the fibers attach to, not an origin point. The anterior iliac crest and the medial sacral crest do not provide attachments for the diaphragm. Knowing the rib origins helps explain how the diaphragm expands the thoracic cavity when it contracts.

The diaphragmatic muscle fibers arise from the inner surfaces of the lower six ribs and their costal cartilages, forming the costal portion of the diaphragm. The central tendon is a central aponeurosis that the fibers attach to, not an origin point. The anterior iliac crest and the medial sacral crest do not provide attachments for the diaphragm. Knowing the rib origins helps explain how the diaphragm expands the thoracic cavity when it contracts.

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