Human Anatomy Crossword

4. This system breaks down food and turns it into energy
5. The immune system fights these microorganisms that cause disease
6. This organ is where most of the nutrients are absorbed from the food you eat
9. The largest bone in the human body
10. This glad of the endocrine system produces the hormone melatonin
11. This organ holds urine until it's ready to come out
12. This system is made up of bones, joints, and ligaments
14. These grape-like sacs in the lungs are where gas exchange (O2 and CO2) occurs
15. This organ contains hydrochloric acid to help kill bacteria and break down food

1. These organs filter the blood and remove waste and water to produce urine
2. This nervous system structure travels through the center of vertebral bones
3. This system contains your largest organ
7. This muscular organ works 24/7 to pump blood throughout your body
8. These structures attach muscles to bones
11. This liquid substance delivers oxygen and nutrients through vessels and removes waste
13. This organ contains more synaptic connections than the stars in the Milky Way