here you copy and paste the discusion and the 2 peers comments, dont forget to mention that the references should be from websites .edu or .gov or .org
The Heart
The heart is a muscular organ located in the thoracic cavity. It consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers). Pick an activity that you would anticipate changing your heart rate. Describe what would happen to your heart during that activity (i.e., increasing or decreasing heart