The human skeleton provides several functions including support, protection, movement and making blood cells. Antagonistic muscles work against each other in pairs. The human reproductive system ...

Male and female reproductive systems allow human reproduction ... multiply and eventually become a fetus. The function of the male reproductive system is to produce sperm cells - male gametes ...

Dr. Francesca Duncan , Thomas J. Watkins Memorial Professor of Reproductive Science at Northwestern University and Associate ...

Microplastics have invaded human fertility and how, affecting women and men equally. Some steps to stem the tide ...