The innate immune system is our body's first line of defense from birth, capable of rapidly responding to invaders. Characterized by its swift and non-specific response, the innate immune system reacts to a broad range of pathogens without targeting specific ones. It includes several key components:
The nervous system is one of the most complex systems in the human body, responsible for transmitting information from the body to the brain and conveying commands from the brain to the body.
Cells are the fundamental units of life, playing a crucial role in health and disease. However, scientists have observed significant differences between individual cell behavior in vitro (under laboratory conditions) and their activities in vivo (within the body).
Regulation of Cellular Lifespan: The length of telomeres directly affects the lifespan of cells. With an increase in the number of cell divisions, telomeres gradually shorten, eventually triggering mechanisms leading to cellular aging or death.
Dawkins describes organisms as "survival machines" constructed by genes, which are created to protect and propagate these genes.
