Final answer:
The process of making an incision into the thorax is known as a thoracotomy, which is a medical procedure aimed at accessing the thoracic cavity for various interventions.
Step-by-step explanation:
The process of cutting or making an incision into the thorax refers to a thoracotomy, which is a surgical operation where the thoracic cavity is opened for diagnostic or therapeutic purposes. This procedure is closely related to the respiratory system and involves the inhalation process where muscles of the thorax facilitate breathing by changing the size of the thoracic cavity. These muscles, including the diaphragm and external intercostal muscles, contribute to expanding the thoracic volume during inspiration, resulting in the decrease of air pressure in the lungs and permitting atmospheric air to flow in.