Do you know what the word “organ” means in the biological sense and what the “organ system”is? I suspect that almost all readers will answer this question in the affirmative. Then here’s another question – the head, hand and heart are the
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Do you know what the word “organ” means in the biological sense and what the “organ system”is? I suspect that almost all readers will answer this question in the affirmative. Then here’s another question – the head, hand and heart are the
Read More