Given statements explain about formed elements, which option contain correct statements about RBC ?
(i) Erythrocytes along with leucocytes and platelets are collectively called formed elements.
(ii) A healthy adult man has, on an average, 5-5.5 millions of RBCs/mm3 of blood.
(iii) RBCs are formed in the yellow bone narrow in the adults.
(iv) RBCs are devoid of nucleus in most of the mammals and are biconcave in shape.
(v) A healthy individual has 12-16 gms of haemoglobin in every 100 ml of blood.
(vi) RBCs have an average life span of 120 days after which they are destroyed in the spleen (graveyard of RBCs)