Trace the path of blood through the heart. These two numbers represent a persons blood pressure.
Blood pressure is the hydrostatic force that blood exerts against a vessel wall.
There is an inverse relationship between the animals size and its pulse. Located in the right atrium wall. Tissue is both nerve and muscle. Heart rate is controlled by hormones, body temperature, and by the opposing actions of two sets of nerves. Outer layer connective tissue with elastic fibers.