I'm pretty sure it is prevent injury. Stretching doesn't usually build strength or endurance.
Answer:
mucus
Explanation:
mucus is more out nose.insulin and bile for digestive system
The answer to your question is "False"
well it increases the permeability of the capillaries to white blood cells and some proteins, to allow them to engage pathogens in the infected tissues... i hope this is what you were looking for