The respiratory system, (consume O2), heart (transport O2), vascular system (transport O2), muscle cells (use O2) I looked it up, and it says it's dependent on that.
Answer:
Even if u dont touch u breath jerms
Explanation:
This answer is actually true
Answer:
true
Explanation:
there are many warning signs like headaches, aching muscles, and overworking, and stuff like that. stress affects your physical health, and mental well being.
