The space between the lungs in the middle of the chest where the heart lies.
A double-layered membrane that surrounds the heart.
Pulmonary arteries and veins, aorta, superior and inferior vena cavae.
base of the heart
The heart's upper portion. It lies at about the level of the second rib.
The lower portion of the heart formed by the tip of the left ventricle. It lies just above the diaphragm.
The two upper chambers of the heart that receive blood.
Receives blood that is low in oxygen.
Receives freshly oxygenated blood.
superior vena cava
Carries blood to the right atrium from the head and upper extremities.
inferior vena cava
Carries blood to the right atrium from the lower body.
The largest vein that drains the heart into the right atrium.
right and left pulmonary veins
Carry oxygenated blood from the lungs to the left atrium.
The two lower chambers of the heart that pump blood.
Pumps oxygen poor blood to the lungs via the left and right pulmonary arteries.
Pumps oxygenated blood to the body via the aorta and it's branches.
Impulse that can be felt at the apex of the heart when the left ventricle contracts.
Grooves on the outside surface of the heart.
A groove that encircles the outside of the heart and separates the atria from the ventricles.
An internal wall separating the right and left sides of the heart.
Separates the right and left atria.
Separates the right and left ventricles.
Circulation from the right side of the heart to the lungs and back to the left side of the heart.
Circulation of oxygenated blood from the left side of the heart to the body and back to the right side of the heart.
Additional contribution of blood (30%) because of atrial contraction.
The amount of blood ejected from a ventricle with each heartbeat.
The percentage of blood pumped out of a heart chamber with each contraction.
A thin smooth layer of epithelium and connective tissue that lines the hearts inner chamber.
A thin muscular layer that consists of cardiac muscle fibers responsible for the pumping action of the heart.
External layer of the heart and the inner layer of the pericardium.
A decreased supply of oxygenated blood to a body part or organ.
A double walled sac that encloses the heart and helps protect it from trauma and infection.
Fibrous parietal pericardium
The rough outer layer of the pericardial sac.
Two layers that make up the inner layer of the pericardium.(perietal and visceral)
Lines the inside of the fibrous pericardium.
Adheres to the outside of the heart and forms the outer layer of the heart muscle also called the epicardium.
The space between the perital and visceral layers that normally contains 20 mL of serous fluid.
Inflammation of the pericardium.
The amount of blood the ventricles can pump to the body
Surgical puncture to remove fluid within the pericardial space surrounding the heart.
Membrane that encloses each muscle cell.
The energy producing part of a cell.
Thread-like structures which have a contractile function
Channels perpendicular to myofibrils that extend through fiber
Stores and releases calcium into sarcoplasm after nervous stimulation
Separate the atria from the ventricles
The AV valve that lies between the right atrium and the right ventricle.
mitral or bicuspid valve
The AV valve that lies between the left atrium and the left ventricle.
contraction phase of the heartbeat
relaxation phase of the heartbeat
the tendonlike, fibrous cords that connect the atrioventricular valves to the papillary muscles of the ventricles
responsible for pulling the atrioventricular valves closed by means of the chordae tendineae
Separate the ventricles from arteries. Right sided pulmonic, left sided aortic. Open during systole to allow blood to be ejected from the heart.
Separates right ventricle and pulmonary artery
located between the left ventricle and the aorta