The brain is the most complex organ in the human body. Neurons transmit information to nerve cells, muscles, and glands which control and coordinate every systemic function within the body. The brain is essentially a control system for a person’s sense of thought, touch, smell, taste, sight, movement, and memory along with so much more. This complex organ is also extremely fragile and requires its own defense system which is called the Blood Brain Barrier.
The Blood Brain Barrier is the term used to describe the thick lining of cerebral microvasculature which protects the brain from harm. The vessels and Blood Brain Barrier endothelial cells can tightly regulate the movement of molecules, ions, and cells through the barrier from blood and the central nervous system. The heavily restrictive barrier is responsible for keeping the Central Nervous System in homeostasis. This ensures proper neuronal function and allows for protection from toxins, pathogens, inflammation, injury, and disease. The main function of the Blood Brain Barrier is to protect the most complex and important organ in the body, the brain. The barrier protects the brain by blocking the circulating toxins and pathogens while, at the same time, allowing essential nutrients to pass through.