Macronutrients- Carbohydrates.

Blood is responsible for transportation of Oxygen in body which is the part of Cardiovascular system.
therefore, correct choice is :
- D.) Cardiovascular system
They have different body parts
The tricuspid valve is situated between the right atrium and right ventricle.
The pulmonary valve is between the right ventricle and the pulmonary artery. The mitral valve is between the left atrium and left ventricle.
Celiac is a gluten intolerance. this means they can not tolerate any type of grains or flours. the answer is fruit salad. fruit has no bred, no grain, and no wheat:)