The 7 systems of the human body are the central nervous system, circulatory system, respiratory system, digestive system, immune system, reproductive system, and skeletal structure and musculature. The average person’s body is 50-60% water. However, the brain is 70% water. The human brain weighs between 2.8 to 3 pounds. A healthy adult heart beats aboutRead more…
Back to School Review Answers September 2020
Published:September 15, 2020
Categories:Business Associates