A Certified Nursing Assistant (CNA) is responsible for the performance of a number of important functions in a healthcare facility. These professionals deliver direct care to patients by performing basic life tasks like bathing, feeding and grooming, as directed by the medical professional in charge. CNAs are responsible for helping patients with a variety of simple and complex tasks, such as turning or moving patients, documenting medical data, checking vital signs, cleaning rooms and changing bed linens, stocking supplies, answering patient calls, taking care of wounds, ensuring all safety protocols are followed and assisting with certain medical procedures under the guidance of a senior physician.