The sphenopalatine artery is a major blood vessel responsible for supplying blood to the upper nasal cavity and surrounding areas. It is also known as the terminal or nasopalatine artery and is comprised of several branches, including the lateral nasal, posterior lateral nasal, and posterior septal arteries. Other synonyms for this arterial structure include the posterior nasal artery and the choanal artery. The sphenopalatine artery plays a vital role in maintaining the health and function of the nasal cavity, and any damage or abnormalities could lead to various health problems, including nosebleeds, sinusitis, and even stroke in rare cases.