Possible Clues:

• Where many blood cells are produced
• Substance that may be donated
• Fatty network of connective tissue
• Soft tissue on me thrown over into grave
• One in a billion, vegetable that produces blood cells
• Tissue -- one bit in the middle of supermarket is put into cart
• Where blood cells are manufactured
• Red blood-cell source
• One may begin to carry in a barrow fatty substance
• Vital part of skeleton? One might at first appear in burial mound