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.
I was scratching my leg and inadvertently scratched a scab. Vary dark red blood came rushing out of this small cut. Scrapes or cuts that have bled lately, the last few months, all bleed very dark blood. I have been on narco for 7 yrs, but my liver was clean when I was in the ER for kidney stones recently.