The integumentary system is the physical system that forms the barrier between the external environment and the internal systems of the body. In humans, this system consists of skin, hair, nails, and ...

A Spelunker Thought She Found Trash in a Cave. It Was Actually Evidence of a Lost Civilization.

As skin ages, it slowly loses its ability to renew and protect. The outermost layer, called the epidermis, becomes thinner.

As the gel is rubbed onto the skin, the sharp-ended stars roll across the epidermis, poking minuscule holes in it. Although those "micro-wounds" close up quickly, they remain open long enough for the ...

This is a preview. Log in through your library . Abstract A microsomal fatty acid elongase activity measured in epidermis of rapidly expanding leek (Allium porrum L.) was 10-fold higher in specific ...