Describe how the respiratory system works with other systems to maintain homeostasis, and how weight gain negatively impacts homeostasis

Question 1: Describe how the respiratory system works with other systems to maintain homeostasis, and how weight gain negatively impacts homeostasis.

Question 2: Imagine a person just ate a large meal composed of only carbohydrates. Consider the process, from the mouth to the large intestine, of chemical and mechanical digestion of carbohydrates. When a person has surgery, what functions change?