Anatomy

The valve at the origin of the aorta, which controls flow of blood out of the heart and prevents backflow.

The passage(s) through which the patient breathes. Naturally this is a patient’s nose and mouth. When patients are sedated and ventilated this can refer to the endotracheal tube or tracheostomy. Occasionally used as a shorthand reference to an oropharyngeal or nasopharyngeal airway – these are smaller plastic tubes that can be inserted into the patient’s … Read more

Air sacs in the lungs where oxygen and carbon dioxide are exchanged.