difference between pulmonary, systemic and portal circulation.
Please refer the link:
https://www.meritnation.com/ask-answer/question/what-is-meant-by-systemic-and-pulmonary-circulation/life-processes-transport-of-food-and-minerals-in-animals-and/7758583
https://www.meritnation.com/ask-answer/question/what-is-the-speciality-of-hepatic-portal-system/body-fluids-and-circulation/6808486