| A | B |
|---|
| Circulatory system | transports oxygen and nutrients to cells and carries wastes away from cells. |
| Respiratory system | Moves oxygen into the body and carbon dioxide out of the body. |
| Digestive system | Breaks down food and absorbs nutrients using a variety of enzymes. |
| Nervous system | Detects changes outside and inside your body and controls the way your body responds to these changes! |
| Skeletal system | Helps you move, protects your internal organs, and gives your body shape and support. It also stores minerals and makes blood cells. |
| Muscular system | Responsible for voluntary movements (such as jumping and running) and involuntary movements (like your heart beating). |
| Endocrine system | Produces chemical messengers called hormones to control growth and maintain homeostasis. |
| Integumetary system | Forms a protective barrier (skin) around the body. Helps prevent water loss and controls body temperature--and it contains sensors. |
| Immune system | Protects the body from infection by outside microbes. |
| Lymphatic system | Takes fluid from the spaces between cells and returns it to the circulatory system. It also filters bacteria and viruses from this fluid in nodes. |
| Reproductive system | Produces sperm in males, and eggs in females. |
| Excretory system | Removes wastes from the body and helps maintain homeostasis by control blood volume and water. |
