The aorta is one of the most important arteries in the human body. Although its basic vascular functions have been extensively studied, its multiple physiological roles as an independent organ have often been overlooked. Recent studies have shown that the aorta not only plays a central role in blood pressure maintenance, but also participates in key physiological processes such as metabolism, endocrinology, nervous system regulation, and immune stress. The unique structure and function of the aorta endow it with significant roles in a variety of physiological and pathological states. This article reviews the importance of the aorta as an independent organ and discusses its structural and functional uniqueness. Emphasis is placed on the metabolic and endocrine regulatory functions of aortic endothelial cells and smooth muscle cells, as well as the role of the aorta in neuroregulation and immune stress. The discussion of these research advances provides new perspectives for an in-depth understanding of the physiological and pathological functions of the aorta and offers potential research directions for future studies.