haversian spaces-spaces in bone formed by the enlargement of haversian canals. haversian system-a central canal containing capillaries and the concentric osseous lamellae around it occurring in compact bone.
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You can only deduct as a charitable donation the difference between the amount you paid and the value of the goods or services you received. So if you âdonateâ $100 to NPR and get a $20 Car Talk mug, only $80 of your donation is deductible. Most large organizations will break this out for you on your receipt.ou can only deduct as a charitable donation the difference between the amount you paid and the value of the goods or services you received. So if you âdonateâ $100 to NPR and get a $20 Car Talk mug, only $80 of your donation is deductible. Most large organizations will break this out for you on your receipt.