With 206 bones, more than 650 muscles, and over nine pints of blood, the human body is truly a work of art! Each system works in conjunction with all the other systems to keep everything running smoothly even while you’re sleeping. Let’s take a tour around some of the major body systems and examine ways to keep them healthy. The Circulatory System The circulatory system pumps blood, hormones, nutrients, oxygen, and other gases around the body. Also known as the cardiovascular system, it includes the heart, lungs, arteries, veins, coronary vessels, and portal vessels. The heart pumps the equivalent of…
Keeping Your Major Body Systems Healthy









