

Circulatory System
Blood vessels/heart

Motor System
Muscles that move us; can point to leg muscles and arm muscles

Immune System
Spleen is in the left part of the upper abdomen, thymus rests on top of the heart behind the breast-bone, bone marrow is in the core of the bone

Nervous System
Brain, spinal cord and peripheral nerves in the entire rest of the body

Musculoskeletal System
Muscles and bones