hemoglobin
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
The protein in red blood cells that binds to oxygen and carries it around the body.
Test yourself
Which word fits the gap? "Low _____ levels can leave a person feeling constantly tired, since less oxygen reaches their tissues."
Answer: hemoglobin
In your own words, what does "hemoglobin" mean?
The protein in red blood cells that binds to oxygen and carries it around the body.
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