1. In addition to it's main function, the digestive system also? Helps the body to maintain fluids and helps the body regulate immune responses.

2. large intestine

3. hypertension

4. myocardium

5. aorta

6. cardiovascular

7. Arterial

8. Hodgkins disease

9. thymus Gland

10. Both A and B

11. Anus

12. Esophagus

13. functional

14. removing immune cells from the body

15. colonoscopy

16. Liver

17. Liver

18. removing excess fluid that accumulates inside in tissues

19. Leukocytes

20. Liver and pancreas