sentence: Erythropoietin promotes the creation of red blood cells.
sentences_before: This is a protein. It is made to carry a large amount of oxygen. Haemoglobin has iron in it. The iron and oxygen gives haemoglobin its red color. This is why blood is red.
sentences_after: Blood type antigens are carried on the surface of red cells.
concept_name: erythropoietin
headings: Blood Red blood cells
categories: Basic English 850 words Biochemistry Cardiovascular system