Human semen is the end result of a sophisticated biological process that is hormonally regulated, produced by highly specialized cellular lines that differentiate in embryo, initiate division at puberty and continue dividing throughout the man’s entire life span in 72-day cycles. Semen is a sensitive indicator of environmental, occupational and lifestyle exposures that can exert direct toxic ef...

Volunteers bring support and validation to those who are marginalized in society. Further, volunteers serve as a means of care concern that extends the mission programmatic objectives human service organizations. beneficial However, there critical benefits volunteering make being volunteer worthwhile. The model for this discussion is three areas development: personal development, skills develop...