Phrenic arteries

Phrenic Arteries are a group of arteries in the human body that supply blood to the diaphragm, the primary muscle involved in respiration. They are typically divided into two types: the superior phrenic arteries and the inferior phrenic arteries.

Superior Phrenic Arteries

The Superior Phrenic Arteries are small arteries that originate from the thoracic aorta, the largest artery in the thoracic cavity. They travel downwards to supply the superior surface of the diaphragm.

Inferior Phrenic Arteries

The Inferior Phrenic Arteries are larger and more significant than their superior counterparts. They typically arise from the abdominal aorta, the continuation of the thoracic aorta after it passes through the diaphragm. The inferior phrenic arteries supply the inferior surface of the diaphragm, but they also give off several branches to other abdominal organs, including the liver and the adrenal glands.

Clinical Significance

The phrenic arteries, particularly the inferior phrenic arteries, can be involved in several pathological conditions. For example, they can be a source of bleeding in cases of trauma to the diaphragm or the upper abdomen. They can also be involved in the spread of cancer from the abdominal organs to the diaphragm.

See Also

• Diaphragm (anatomy)
• Thoracic aorta
• Abdominal aorta
• Respiration (physiology)