The Appeal to Nature (also, Biologizing; The Green Fallacy): The contemporary romantic fallacy of ethos (that of Mother Nature) that if something is natural it has to be good, healthy and beneficial. E.g., Our premium herb tea is lovingly brewed from the finest freshly-picked natural T. Radicans leaves.
Found only in the heart, cardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract.
Introduction. The heart, a contractile organ within the circulatory system, pumps blood through the blood vessels by repeated rhythmic contractions. Being an aerobic organ, it consumes oxygen in proportion to its workload. Two of the factors which determine this are the blood pressure and the heart rate (HR).