1. Multiple different systems work together to do so. The respiratory system takes air from our surroundings and puts it into the lungs. The circulatory system pulls the oxygen from the lungs through and transports it through the bloodstream. The circulatory system then carries it around the body.
2. When you digest foods, your body needs to absorb the nutrients from it. Once the food is digested, the nutrients is transported into the bloodstream. The nutrients then travel through the body to then be used for everyday functions.
3. (I don’t quite know how to word it, but I would think about different cold symptoms and how they may effect your body systems.)
Sorry I couldn’t help with 3, but hope this helped you! :)
