Question

-------- of blood contain haemoglobin a iron rich compound.​

Answer 1

Answer:

Hemoglobin is the protein in blood that is rich in iron and gives it the red color. It makes up about 95% of a red blood cell and has an oxygen binding capacity of 1.34 mL O2/g, which satisfies the need for the average adult consumption of 250 mL of oxygen per minute. ... Four heme groups carry the iron in hemoglobin.

Answer 2

RBCs

Explanation:

thus is your answer