write me a paragraph comparing and contrasting the human circulatory system and the bird circulatory system (make it like a 7th grader wrote it)

Answer 1

The human circulatory system and the bird circulatory system both have important jobs of moving blood and oxygen throughout the body, but they are different in a few key ways. In humans, the circulatory system is a closed system, meaning the blood flows through vessels like veins and arteries without leaving them. In contrast, birds also have a closed circulatory system, but their hearts are very efficient because they have four chambers instead of just two like in humans. This four-chambered heart helps birds pump oxygen-rich blood to their bodies and oxygen-poor blood to their lungs more effectively. Additionally, birds have a high metabolism, which means they need more oxygen for flying, so their circulatory system works faster than ours. Overall, while both systems transport blood and oxygen, birds have some special features that help them meet their unique needs as flying animals.