Relate the structure of the heart to its function as a pump Trace the pathway of oxygenated and deoxygenated blood thorough the chambers of the heart

The vital importance of the heart is obvious. If one assumes an average rate of contraction of 75 contractions per minute, a human heart would contract approximately 108,000 times in one day, more than 39 million times in one year, and nearly 3 billion times…

atrioventricular valves — one-way valves located between the atria and ventricles; the valve on the right is called the tricuspid valve, and the one on the left is the mitral or bicuspid valve. ejection fraction — portion of the blood that is pumped or ejected from the heart with each contraction; mathematically represented by SV divided by EDV. Frank-Starling mechanism — relationship between ventricular stretch and contraction in which the force of heart contraction is directly proportional to the initial length of the muscle fiber. isovolumic contraction — (also, isovolumetric contraction) initial phase of ventricular contraction in which tension and pressure in the ventricle increase, but no blood is pumped or ejected from the heart.

Be able to describe the location and position of the heart within the body cavity; describe the internal and external anatomy of the heart; identify the tissue layers of the heart.