Answer:
Capillaries
Explanation:
Deep within your lungs, this oxygen passes into your bloodstream through tiny blood vessels called capillaries. Oxygen-rich blood reaches your brain through your internal carotid arteries and your vertebral arteries.
Daily stimulation makes us use out muscles, and if we use them daily, we can practice them. It's like using something that you haven't used in a while, it gets hard to bend or whatever over time when we don't use it, it may break into pieces, but if we use it daily, we exercise the muscles so they don't "get hard and break".
The space between the diaphragm and pelvis is referring to the Pelvic inlet and the outer part is the Pelvic outlet. You may want to visit anatomy-medicine.
I hope this may help- Good luck.
Stretch for about 30 min each day.... make sure to warm up before you stretch though