| A | B |
|---|
| nervous system | senses stimuli from the environment, processes information, stores memories, and controls the body's actions |
| circulatory system | carries important molecules throughout the body (via the blood) |
| respiratory system | takes in (breathes in) oxygen and releases (breathes out) carbon dioxide |
| digestive system | makes the energy in food available to cells in the body by breaking it down into smaller pieces called nutrients |
| muscular system | moves the body's parts, both external (like arms and legs) and internal (like stomach and heart) |
| skeletal system | supports the body, facilitates movement, and protects the body's internal organs |
| excretory system | waste removal from the body |
| endocrine system | collection of glands that make hormones that help with growth |
