systems of the body

1. an organ system consisting of skeletal, smooth, and cardiac muscle.
4. the organs that make urine and remove it from the body
7. the largest organ of the body that forms a physical barrier between the external environment and the internal environment that it serves to protect and maintain
8. body's support structure
9. produce and release hormones into the bloodstream

2. made up of your lungs, diaphragm, throat, nose and mouth. Its main function is to breathe in oxygen and breathe out carbon dioxide.
3. made up of a series of organs that allows your body to get the nutrients and energy it needs from the food we eat.
5. a network of the heart and blood vessels that pumps blood throughout the body, delivering oxygen and nutrients and removing waste products like carbon dioxide.
6. a complex network of organs, cells and proteins that defends the body against infection, whilst protecting the body's own cells
10. sends messages back and forth between the brain and the body