Unhealthy eating patterns, including excessive total calorie intake and excessive fat and sugar intake, are associated with sub-optimal sperm production and/or infertility in men.
Growth hormone reduces obesity through its actions on two enzymes which control fat accumulation and the breakdown of stored triglycerides into free fatty acids.
In boys, maturation of the reproductive organs causes puberty symptoms like increased penis size, sperm production, deepening voice and chest hair growth.
Jet lag, also known as circadian dysynchronism or flight dysrhythmia, is a temporary condition caused by rapid air travel across multiple time zones. It is…
The central nervous system (CNS) consists of the brain, spinal cord, spinal fluid and neurons, which transmit signals from the brain to other body organs.
The innate immune system includes skin and other barriers which prevent disease entering the body, and inflammatory and other responses which fight disease.