The answer is A, from smallest to biggest
For 1. the answer is The muscular system is responsible for the movement of the human body. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found of the heart, digestive organs, and blood vessels.
THE SMALL INTESTINE.......... absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use.
Answer:are usually caused by genetic or lifestyle factors.
Explanation:
