fluid

1 - If the consumer complains of pain or numbness, the needle must be withdrawn prior to fluid being injected.

2 - Stem cells that can grow into a variety of human tissues have been discovered in the fluid that surrounds a fetus during pregnancy.

3 - At temperatures close to absolute zero some materials exhibit remarkable properties, such as superconductivity and super fluidity.

4 - There are now very few areas in the body that cannot be sampled for analysis, and virtually no organs from which tissue or fluid cannot be obtained.

5 - Acid rain is measured through pH tests that determine the concentration of hydrogen ions in a liter of fluid.