Biological Heart Valves. Biological Heart Valves are made of tissues and valves derived from animals or human donors. Their biggest advantage is that they do not cause blood clotting on their surface and truly replicate the form and function of the normal human valve.
The biggest difference between cured and uncured is the fact that the uncured uses natural curing agents, such as celery powder, which transforms into nitrite when it is processed. Thus, uncured products have labels with: âNo Nitrates or Nitrites added except those naturally in celery powder or juiceâ.
DEFINITION of 'Unsecured Debt'. A loan not backed by an underlying asset. Unsecured debt includes credit card debt, medical bills, utility bills and any other type of loan or credit that was extended without a collateral requirement. It presents a high risk for lenders since they may have to sue to get the money they're owed if the borrower doesn't repay the full amount owed.