Answer:
Integumentary System: acts as a barrier to protect the body from the outside world (ie. skin, hair, and nails)
Circulatory System: carries oxygen and nutrients to cells, carries waste away from cells (ie. heart and blood vessels (veins and arteries))
Digestive System: converts food into molecules that can be used by cells (ie. mouth, esophagus, stomach, small intestine, large intestine)
Respiratory System: provides oxygen to the blood and removes carbon dioxide from the body (ie. nose, mouth, pharynx (throat), trachea, and lungs)
Immune System: fights off illness and disease (ie. lymph nodes, white blood cells, and spleen)
Muscular System: allows for movement (ie. cardiac muscles, skeletal muscles, and smooth muscles)
Nervous System: coordinates all body functions, sends signals to and from all parts of the body (ie. brain, spinal cord, and neurons)
Skeletal System: support the body, protect internal organs, store minerals (ie. bones and joints)
