Elizabeth Martin and Robert Hine. Latest Edition (7 ed.) Fully revised and updated, the sixth edition of this dictionary provides comprehensive coverage of biology, biophysics, and biochemistry, as well as key terms from medicine and palaeontology.
For example, if someone scratches a mole until it bleeds, the resulting lesion, a crust, is now a secondary skin lesion. The most common secondary skin lesions include: 1  crust: a crust, or a scab, is created when dried blood forms over a scratched and irritated skin lesion. 2  ulcer: typically caused by a bacterial infection or physical trauma. 3  scale: patches of skin cells that build up and then fall off the skin.
Liquid dish-washing detergent mixed with water can remove the dried blood stain from your cloth couch. Add 1 tablespoon of liquid dish washing detergent to 2 cups of cold water in a large bowl to make a detergent solution. Dip a white cloth in the solution and use it to moisten the dried blood stain.