Alberta Health Services Practice Test

The combining form phren/o is used to denote which body part?

Heart Lung Diaphragm Liver

Correct Answer:

Diaphragm

Explanation:

Phren/o denotes the diaphragm, the muscle that separates the chest from the abdomen and powers breathing. This combining form appears in terms related to diaphragmatic structures and function, such as the phrenic nerve that stimulates the diaphragm. The other options use different roots: heart is cardi/o, lung is pulmon/o or pneumon/o, and liver is hepat/o. So phren/o specifically points to the diaphragm.

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