Explanation:
The intercostal muscles receive their blood supply from the intercostal arteries, which run along the inferior border of each rib. These arteries originate from the thoracic aorta. Additionally, branches of the internal mammary arteries contribute to the blood supply of the anterior intercostal spaces.
In terms of innervation, the intercostal muscles are primarily innervated by the intercostal nerves. These nerves arise from the anterior rami of thoracic spinal nerves and travel along the inferior margin of each rib, providing motor and sensory innervation to the intercostal muscles and overlying skin.
