Respiratory and Skin Systems

1. Respiratory system
   1. Function
      1. Gas exchange (role of alveoli)
      2. Thermoregulation
      3. Protection against disease, particulate matter
   2. Breathing structures and mechanisms
      1. Diaphragm
      2. Rib cage
      3. Differential pressure

2. Skin system
   1. Functions
      1. Homeostasis and osmoregulation
      2. Thermoregulation
      3. Physical protection
   2. Structure