1. External respiration exchanges gases between bloodstream and lungs
2. Internal respiration exchanges gases between bloodstream and body tissue.
3. Air vibrating in vocal cords causes sound
4. Olfaction.
<span>Anorexia is often manifested by
:
</span><span>-weightloss
-avoid friends, family, outputs
- the obsessive fear of gaining weight:
- absence of menstruation</span>