11.   Complicating matters, depression, like most psychiatric illnesses, cannot be detected with blood tests and produces no changes in body tissue or other measurable physiological markers.

12.   Embryonic stem cells differ from adult stem cells, which are found in the various adult body tissues they help maintain.

13.   Finally, it seemed, what with all the jangling vertebrae and squished body tissue, the fun was over.

14.   He was a highly respected pathologist at the Veterans Administration hospital in East Orange, N.J., who examined actual body tissues under a microscope.

15.   How much body tissue was devoted to brain, muscles and blubber?

16.   HIV, however, which constantly mutates and has the ability to hide in different body tissues for years, has proved more difficult.

17.   However, they increase body fat levels instead of lean body tissue like muscle.

18.   In principle these pure antibodies, because of their remarkable specificity, could be used to diagnose disease, or to carry therapeutic agents to particular body tissues.

19.   Initially the umbrellas are held in place by force, but they are eventually overgrown by body tissue, creating a permanent seal, Zahn said.

20.   It is thought to help preserve the elasticity of body tissues, slowing the aging process.