👉 The term "infrathoracic" is a medical term used in the field of medicine to describe the space between the thoracic cavity and the abdominal cavity. This space is known as the intercostal space, which is located between the upper and lower ribs. The name "infrathoracic" comes from the Greek words "infrat" (below) and "horax" (chest), indicating that this area lies below the chest wall and above the abdominal cavity.