PATHOLOGY

Detailed explanation-1: -Hemoglobin is the protein inside red blood cells. It carries oxygen. Red blood cells also remove carbon dioxide from your body, bringing it to the lungs for you to exhale.

Detailed explanation-2: -What are red blood cells? The red blood cells are a very important part of your blood, along with white blood cells, platelets and plasma. Red blood cells contain a protein called haemoglobin, which carries oxygen from your lungs to all parts of your body.

Detailed explanation-3: -Approximately 25 trillion red blood cells (RBCs) circulate in the bloodstream of an adult individual, each one packed with  260 million haemoglobin molecules.