Answer: Hemoglobin is produced in bone marrow by erythrocytes and is circulated with them until their destruction. It is then broken down in the spleen, and some of its components, such as iron, are recycled to the bone marrow.
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Intestine, the intestine digests food involuntary.
I can t make a flowchart for you
In the south it becomes 24 hour darkness and in the north it is 24 hour sunlight