Emergency essentials -- Cardiovascular emergencies -- Respiratory emergencies -- Gastrointestinal emergencies -- Neurologic emergencies -- Musculoskeletal emergencies -- Endocrine and metabolic emergencies -- Obstetric and gynecologic emergencies -- Genitourinary emergencies -- Hematologic emergencies -- Eye, ear, nose, and throat emergencies -- Dermatologic emergencies -- Environmental emergencies -- Medication toxicity and overdose -- Psychiatric emergencies.