Fill in the blanks using appropriate words given in the bracket.
(hemoglobin, alkaline, diaphragm, red bone marrow, acidic, voluntary, involuntary,)
(i) RBCs of the blood contain ……….., an iron compound.
(ii) ……………….. is present between thoracic and abdominal cavity
(iii) Cardiac muscles are …………… .
(iv) pH of oxygenated blood is ……………
(v) Production of RBCs occurs in ……………… .