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Glacial striations or striae are scratches or gouges cut into bedrock by glacial abrasion. These scratches and gouges were first recognized as the result of a moving glacier in the late 18th century when Swiss alpinists first associated them with moving glaciers. They also noted that if they were visible today that the glaciers must also be ...
It can be superficial involving only the epidermis to deep, involving the deep dermis. Abrasions usually involve minimal bleeding. [ 2 ] Mild abrasions, also known as grazes or scrapes , do not scar or bleed because the dermis is left intact, but deep abrasions that disrupt the normal dermal structures may lead to the formation of scar tissue.
A finer or softer abrasive will tend to leave much finer scratch marks which may even be invisible to the naked eye (a "grainless finish"); a softer abrasive may not even significantly abrade a certain object. A softer or finer abrasive will take longer to cut, as it tends to cut less deeply than a coarser, harder material.
Cat scratches generally aren't cause for concern — but you should watch for these symptoms. (Getty Images) (Getty Images) Cats are cute, and studies have shown that having one as a pet can ...
Penetrating trauma is an open wound injury that occurs when an object pierces the skin and enters a tissue of the body, creating a deep but relatively narrow entry wound.In contrast, a blunt or non-penetrating trauma may have some deep damage, but the overlying skin is not necessarily broken and the wound is still closed to the outside environment.
Trying to come up with joke answers to these deep questions can be fun, too. You might not solve the mysteries of the universe, but you'll definitely get the conversation flowing, and have a good ...