This reading comprehension provides a great review of the respiratory and circulatory systems, and how they work together for homeostasis in the human body. The article is written in friendly and engaging language. The article is a page and a half and includes a page and a half of standards-aligned comprehension and analyses questions. I use the article for end-of-year review (7th-grade science essential standards). The article can be used for literacy groups, individual DEAR or homework reinforcement.