myoglobin vs. hemoglobin

myoglobin vs. hemoglobin: What's the difference?

Myoglobin and hemoglobin are both proteins that transport oxygen in the body, but hemoglobin does this in the blood, while myoglobin does this in muscle (it’s sometimes referred to as hemoglobin of muscle). Though their function is similar, myoglobin weighs less and carries more oxygen and less carbon monoxide than blood hemoglobin. Myo- means “muscle” and hemo- means “blood.”