The overall process by which oxygen is taken from the air and transported to the body cells for the metabolic process, while carbon dioxide and water (the waste products generated by cells ) are returned to the environment.

The overall process by which oxygen is taken from the air and transported to the body cells for the metabolic process, while carbon dioxide and water (the waste products generated by cells ) are returned to the environment.

A standard chart depicting the results of a person's hearing test is known as a(n) ____________.

The crown of a very carious tooth suddenly fractures while the patient is standing eating at a take-away food outlet and a fragment is inhaled.

Identify the structure that keeps food and drink from entering the lower respiratory tract.

The serous membrane adhering to the surface of the lungs is the ______ and the serous membrane that lines the thoracic cavity is the ______.