Final answer:
The Internal Thoracic Artery branches into the Muscular Phrenic Artery and Anterior Intercostal Arteries at the 8th rib, supplying blood to chest wall structures.
Step-by-step explanation:
The Internal Thoracic Artery, also known as the mammary artery, branches into the Muscular Phrenic Artery and Anterior Intercostal Arteries at the level of the 8th rib.
This artery arises from the subclavian artery and supplies blood to the thymus, pericardium of the heart, and the anterior chest wall. The branches of the thoracic aorta, including the Internal Thoracic Artery and its derivations, play vital roles in supplying blood to various structures in the thoracic cavity and the vertebral column.