Blood picks up from the digestive system and takes it to the cells. oxygen glucose plasma carbon dioxide

           b)  Glucose

Explanation:

             we need food to fuel our bodies for energy, growth and repair. The digestive system converts the foods we eat into their simplest form, like glucose (sugars), amino acids (that make a protein) or fatty acids (that make a fats). The broken down food is then absorbed into the blood stream from the small intestine and the nutrients are carried to each cell in the body.

answer: my answer would be a) scheduling workouts with your friend for consistent days and time

explanation: for me personally i would be much more likely to go to the gym with a friend because i wouldn't want to cancel on them or stand them up.