How well do you know the human body?

References:

[1] Complete Periodic Table (Part 1): What elements are contained in the human body? [J]. Newton-Science World, 2006(10):1.

[2] Tao Xinxin. How sensitive are the five senses? [J]. Science for the masses (Primary School Edition), 2009, 05(No.580):34-34.

[3] Bill Bryson. A Brief History of the Human Body[M]. Shanghai: Wenhui Press, 2020.

[4] https://www.sciencedaily.com/releases/2017/12/171213095532.htm?utm_source=dlvr.it&utm_medium=facebook

[5]https://www.healthline.com/health/mens-health/normal-sperm-count