1. What vitamin do humans mainly get from sunlight?

2. How many teeth does a typical adult human have?

3. What is the human body’s largest organ?

4. Which enzyme in saliva is responsible for beginning the digestion of starches in the mouth?

5. If uncoiled, the DNA from all the cells in a single human body would reach approximately how far?

6. Which branch of the nervous system is responsible for the 'fight or flight' response?

7. What is the primary function of platelets in the human blood?

8. Which organ in the lymphatic system acts as a major filter for the blood?

9. Which blood type is considered the 'universal donor' because it can be safely given to almost any patient?

10. From which parent do humans inherit nearly all of their mitochondrial DNA?

11. What is the primary function of red bone marrow in the human body?

12. What is the name of the fluid that lubricates and reduces friction in human joints?

13. What is the name of the lining of the uterus that is shed during menstruation?

14. Where in the human body are the menisci located?

15. Which organ receives blood directly from the digestive tract to filter out toxins before the blood reaches the rest of the body?

16. What is the primary purpose of the blood-aqueous barrier in the human eye?

17. What is the function of the Eustachian tube in the human ear?

18. What is the name of the fatty insulation that speeds up nerve impulses?

19. What is the anatomical name for the 'white of the eye'?

20. Which part of the brain is primarily responsible for fine-tuning motor movements and maintaining balance?