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When cardiac or skeletal muscle is not receiving enough oxygen to meet metabolic demands, a person will experience pain, such as angina, chest pain during a heart attack, or leg pain during a vigorous sprint.
Word of the Day
- Having no light.
- Of or relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur.
The word 'aphotic' comes from Greek roots meaning 'without' and 'light'.