Structural and Movement Systems
Skeletal
The skeleton framework for our movement, posture, and physical abilities.
Muscular
All muscles, tendons, and ligaments attached to the skeleton.
Nervous
The body’s communication network of brain, spinal cord, and all nerves.
Integumentary
Nails, nerves, hair follicles, and skin.
Circulatory and Respiratory Systems
Cardiovascular
Heart, arteries, veins, and blood that transport oxygen, remove carbon dioxide, and regulate pH.
Respiratory
Lungs, trachea, airways that move oxygen into the body and carbon dioxide out.
Digestive
Mouth, esophagus, stomach, small intestine, large intestine, rectum, anus.
Urinary
Kidneys, ureters, bladder, and urethra that work together to filter toxins from blood.
Regulatory and Protective Systems
Endocrine
All glands that secrete hormones into the bloodstream to regulate metabolism.
Immune
Lymph nodes, bone marrow, thymus, spleen, adenoids, tonsils, skin.
Reproductive
Only incomplete organ system, fulfills ½ of the mission of producing offspring.
Microbiome
Over 40 trillion organisms living in your gut, mouth, and skin including bacteria, archaea, eukaryotes, and viruses.
