As individuals, firefighters must keep their team leader advised of conditions and hazards they find as work is performed.

__________ inflammation of the lung tissue

Fill in the blank with correct word.

What is an electrocardiogram?

A. A graphic recording of the electric activity of the heart, utilizing ultrasound to create images of the heart B. An internal observation of the structure of the human body, organs, vessels, tubes, or cavities, using an instrument known as an endoscope C. A graphic recording of the electric activity of the heart through the placement of electrodes along the surface of the skin D. A graphic record of the electric waves of the brain through the placement of electrodes along the surface of the scalp