Question

define hemoglobin??? ​

Answer 1

Answer:

Haemoglobin is a red substance in the blood that carries the gas we need to live (oxygen) and contains iron.

Explanation:

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Answer 2

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Hemoglobin, also spelled haemoglobin, iron-containing protein in the blood of many animals—in the red blood cells (erythrocytes) of vertebrates—that transports oxygen to the tissues. Hemoglobin forms an unstable reversible bond with oxygen.