Endocardium
The inside layer of the heart wall
Pericardium
Doubled wall sac surrounding the heart
Venea cava (superior & inferior)
Large veins returning blood from the body regions to the heart
Atrium (L & R)
Two superior chambers of the heart
Pulmonary arteries
Vessels from the right ventricle leading to the lungs with deoxygenated blood
Ventricles (R & L)
The two inferior chambers of the heart, most of the volume
Aorta
Largest artery where blood is ejected into the body
Valve
Cups or flaps that prevents the blood from flowing back
Sinotrial node (SA)
The heart pacemaker
Pacemaker
The SA node , determines heart rate
Atrioventricular node (AV)
Specialized mass of conducting cells located in the inferior portion of the right atria
Heart sounds
The sounds associated with the closing of the heart valves
Systemic circulation
The blood vessels that carry the blood supply to and from all body tissue
Pulmonary circulation
Blood vessels that Carry blood to and to and from the lungs
Pulse
Rhythmic expansion and recoil of arteries resulting from heart contraction
Blood flow
The volume of blood flowing through a vessel, an organ, or entire circulation in a given period
Blood pressure
The force per unit area exerted on a vessel by the contained blood
Blood Viscosity
The internal resistance to flow that exists in all fluids and is related to thickness or stickiness
Resistance
The opposition to flow