ANATOMY

Detailed explanation-1: -Red blood cells, also known as erythrocytes, deliver oxygen to the tissues in your body. Oxygen turns into energy and your tissues release carbon dioxide. Your red blood cells also transport carbon dioxide to your lungs for you to exhale.

Detailed explanation-2: -Red blood cells contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body.

Detailed explanation-3: -Also called RBC and red blood cell. Blood cells. Blood contains many types of cells: white blood cells (monocytes, lymphocytes, neutrophils, eosinophils, basophils, and macrophages), red blood cells (erythrocytes), and platelets.

Detailed explanation-4: -The term Erythrocytes (from the Gk erythros=red and kytos=cell) is used for RBCs because of their characteristic red colour which also gave blood its colour due to their abundance.

Detailed explanation-5: -The correct answer is (3) Erythrocytes lack a nucleus. Erythrocytes are red blood cells (RBCs). Mature and circulating RBCs do NOT have a nucleus.