Emotions play an important part in our daily lives. Fear is one such emotion that is pre-programmed into all animals and people as an instinctual response to potential danger. As for what is fear biologically speaking, when a person experiences fear, certain areas in their brain such as the amygdala and the hypothalamus are immediately [...]

Blood clots consist of blood cells and fibrin strands that form to stop the flow of blood after an injury. Blood clots are vital for wound healing. If blood was not able to clot, death would occur from excessive bleeding from a simple cut.