心肺

1. Origins, structure, and basic meaning

• Structure: 心肺 (しんぱい) is a noun referring jointly to the heart and lungs, and it appears in compounds such as 心肺機能, cardiopulmonary function.
• Basic usage: It is used when learning how the heart and lungs work or comparing cardiopulmonary function before and after exercise.
  • 救命講習で心肺の働きを図から学んだ。 — In lifesaving class, we learned how the heart and lungs work.
  • 運動前後の心肺機能を比べる実験を見学した。 — We observed an experiment comparing cardiopulmonary function before and after exercise.

2. Common pitfalls and similar expressions

• Same pronunciation
  • 心肺 names the heart and lungs. It is pronounced like 心配, which means worry, so the spelling and context distinguish them.