I would say that pain is your answer
The sponge is a very porous structure, while the soap us more solid.
In the lungs. The carbon dioxide/oxygen diffuses through the capillaries surrounding the alveoli (grape like structures) in the lungs
A circle, I think, so yee
First up defining stress. Stress is actually what we go through everyday, it's like the definition of challenge. For us people stress is what we don't want but is the essential thing of forming us. For plants experiencing stress just like malnutrition they are slow to bloom and make their fruits.
