Critical care focuses on the management of patients with life-threatening illnesses or organ failure who require continuous monitoring and advanced supportive therapies. It integrates physiology, emergency medicine, pulmonology, cardiology, nephrology, infectious diseases, and anesthesiology to stabilize acute conditions and prevent further deterioration. The field addresses issues such as shock, severe infections, respiratory failure, cardiac instability, trauma, and complex postoperative care, often involving mechanical ventilation, hemodynamic support, and specialized interventions. Critical care plays a central role in modern hospitals, providing rapid, coordinated, multidisciplinary treatment that improves survival and recovery in the most severe clinical situations.