1. Skeletal System: Provides support, structure, and protection for the body. It also produces blood cells and stores minerals.

2. Muscular System: Enables movement, maintains posture, and generates heat.

3. Nervous System: Controls and coordinates all body functions through electrical signals. It includes the brain, spinal cord, and nerves.

4. Circulatory System: Transports blood, oxygen, and nutrients throughout the body. It includes the heart, blood vessels, and blood.

5. Respiratory System: Responsible for gas exchange (oxygen in, carbon dioxide out). It includes the lungs, trachea, and bronchi.

6. Digestive System: Breaks down food into nutrients the body can absorb. It includes the mouth, stomach, intestines, and liver.

7. Endocrine System: Produces and releases hormones that regulate various bodily functions. It includes glands like the thyroid, pancreas, and adrenal glands.

8. Lymphatic System: Part of the immune system. It removes waste and toxins, and transports lymph fluid throughout the body.

9. Integumentary System: The skin, hair, and nails. It acts as a barrier against infection, regulates body temperature, and provides sensory input.

10. Urinary System: Filters waste products from the blood and removes them from the body in urine. It includes the kidneys, bladder, and ureters.