The latest research suggests your heart has a brain, and may be far more complex than imagined. This emotion, for example, boosts your heart attack risk five-fold, and your stroke risk three-fold.
The main function of the respiratory system is gaseous exchange. This refers to the process of Oxygen and Carbon Dioxide moving between the lungs and blood. Diffusion occurs when molecules move from an area of high concentration (of that molecule) to an area of low concentration.
The respiratory system consists of the nose, nasal cavity, pharynx, larynx, trachea, bronchial tree, and the lungs. Its primary function is the basic exchange of oxygen and carbon dioxide. It filters the air that enters the body and exchanges gases within air sacs in the lungs called alveoli.