Final answer:
Arrhythmia and dysrhythmia, Tachycardia and palpitation, Oxygenated and oxygen-rich are word pairs that are opposite in meaning.
Step-by-step explanation:
The word pairs that are opposite in meaning are:
- Arrhythmia and dysrhythmia: Arrhythmia refers to an irregular heartbeat, while dysrhythmia refers to an abnormal heartbeat rhythm.
- Tachycardia and palpitation: Tachycardia refers to a fast heart rate, while palpitation refers to an irregular or strong heartbeat.
- Oxygenated and oxygen-rich: Oxygenated refers to blood that has been oxygenated in the lungs, while oxygen-rich refers to blood that is rich in oxygen.
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