Gadzira shanduro yakaoma zvikuru yemutsara uyu Hemes inowanzonzi inozivikanwa sezvikamu zvehemoglobin, ruvara rutsvuku muropa.
Chokwadi, shanduro yakaoma kunzwisisa zvikuru yemutsara wacho ndeiyi "Hemes inowanzonzi inozivikanwa sezvikamu zvehemoglobin, pigment tsvuku muropa, asi inowanikwawo mune mamwe mahemoproteins anokosha muzvipenyu akadai se myoglobin, cytochrome, catalase, uye endothelial nitric oxide synthase. "