The cancer cells placed protective membrane «sacks» round cell waste, and filled them with chemicals to break up and recycle the contents. (cancerresearchuk.org)
He cut open the tough, protective membrane around the thicket of nerve fibers that comprise the spinal cord and made a small nick. (discovermagazine.com)
Corneal erosion or ulceration is a defect in the clear protective membrane covering the iris and the lens of the eye. (texaswestveterinarian.com)