How would you describe the muscular-skeletal system? Is it one system or two systems?
It is actually 2 systems.
The skeletal system is for our body to take form ,shape and bear our body weight. The muscular system is for doing movement through the use of muscles, ligaments and tendons. Many anatomy books would combine the two because simply one system cannot exist or perform its properly without the other. Imagine if we're all muscle, we'd be very fleshy and we won't be able to stand or walk. If we're all bones, we would be like statues.