Surgical scalpel is re useable because it can be easily sanitized
Condoms reduce the risk of pregnancy as well as STDs. They are the only form of birth control that protects from STDs, currently.
Hope that helped you.
Answer:
Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.
I believe the term you are looking for is as simple as Flexibility.
