Hemoglobin: Normal, High, Low Levels by Age, Test, Deficiency Hemoglobin (abbreviated Hgb or Hb) is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs
Hemoglobin - Wikipedia Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the other tissues of the body, where it releases the oxygen to enable aerobic respiration which powers an animal's metabolism A healthy human has 12 to 20 grams of hemoglobin in every 100 mL of blood
Hemoglobin test - Mayo Clinic Hemoglobin carries oxygen to the body's organs and tissues when you breathe in Then it carries the waste gas carbon dioxide back to the lungs to be breathed out
Hemoglobin Test: Normal, High, Low Levels Results Information about low and high hemoglobin levels in the blood Learn about normal, high, and low hemoglobin levels can cause disease of anemia, sickle cell, and thalassemia