Bone marrow contains tissue that produces lymphocytes. B-lymphocytes (B-cells) mature in the bone marrow. T-lymphocytes (T-cells) mature in the thymus gland. Other blood cells such as monocytes and leukocytes are produced in the bone marrow.
However, Soma and anxiety is not one of these situations. Since the anti-anxiety effects of Soma are not very strong, you would need to take unsafe amounts to treat your anxiety. A good doctor would not prescribe Soma for your anxiety and would suggest other alternatives.
1 Alprazolam (Xanax) - FDA approved for the treatment of panic and anxiety disorders. Alprazolam is the most prescribed benzodiazepine in the US.  Bromazepam (Lectopam) - used as a short-term treatment for anxiety and to alleviate anxiety before surgery.