Structures and Function of the Heart

<p>At the junction of the superior vena cava and right atrium (C)</p> Signup and view all the answers

<p>Bundle of His (A)</p> Signup and view all the answers

<p>Left fibrous trigone (D)</p> Signup and view all the answers

<p>Forms the heart valves (A)</p> Signup and view all the answers

<p>Left atrium and ventricle (B)</p> Signup and view all the answers

<p>Anterior interventricular branch (B)</p> Signup and view all the answers

<p>Atrial septum (D)</p> Signup and view all the answers

<p>The artery that gives rise to the posterior interventricular artery (C)</p> Signup and view all the answers

<p>Great cardiac vein (A)</p> Signup and view all the answers

<p>Epicardium (C)</p> Signup and view all the answers

<p>Sinoatrial node in about 40% of the population (D)</p> Signup and view all the answers

<p>Thinnest site of the interatrial septum (B)</p> Signup and view all the answers

<p>Left coronary artery and right coronary artery (B)</p> Signup and view all the answers

<p>Left and right ventricles (C)</p> Signup and view all the answers

<p>Myocardium (C)</p> Signup and view all the answers

<p>Small cardiac vein (A)</p> Signup and view all the answers

<p>The area of the myocardium supplied by each artery (C)</p> Signup and view all the answers

<p>Determines the heart rate and initiates muscle contraction (A)</p> Signup and view all the answers

<p>Atrioventricular node (B)</p> Signup and view all the answers

<p>Internodal tracts (A)</p> Signup and view all the answers

<p>His bundle (C)</p> Signup and view all the answers

<p>Right coronary artery (B)</p> Signup and view all the answers

<p>Numerous smaller branches (D)</p> Signup and view all the answers

<p>Purkinje fibers (A)</p> Signup and view all the answers

<p>Atrioventricular nodal branch (D)</p> Signup and view all the answers

<p>Fibrous pericardium (C)</p> Signup and view all the answers

<p>A small amount of fluid (B)</p> Signup and view all the answers

<p>Transverse pericardial sinus (B)</p> Signup and view all the answers

<p>Behind the lower part of the sternum (B)</p> Signup and view all the answers

<p>Pericardiocentesis (C)</p> Signup and view all the answers

<p>To deliver drugs directly into the heart muscles (B)</p> Signup and view all the answers

<p>It is located posterior to the heart between the pulmonary veins. (B)</p> Signup and view all the answers

<p>Pericardial effusion (B)</p> Signup and view all the answers

<p>Right atrioventricular orifice (D)</p> Signup and view all the answers

<p>Aortic valve (D)</p> Signup and view all the answers

<p>Interventricular septum (B)</p> Signup and view all the answers

<p>Posterior interventricular branch (B)</p> Signup and view all the answers

<p>Prevent valve inversion (C)</p> Signup and view all the answers

<p>Right atrium (B)</p> Signup and view all the answers

<p>Right ventricle (A)</p> Signup and view all the answers

The wall that separates the two atria of the heart.

The wall that separates the two ventricles of the heart.

A hole in the interventricular septum, often in the membranous part.

A system of specialized cells that initiates and transmits electrical impulses for heart contractions.

The pacemaker of the heart, located in the right atrium, initiating electrical signals.

A network of dense connective tissue forming the structural foundation of the heart valves and the base of the great vessels.

A ring-shaped structure which surrounds heart valves.

The inner lining of the heart chambers and valves.

The layer of the heart wall containing the cardiac muscle tissue.

The outer layer of the heart wall, also known as the visceral layer of the serous pericardium.

A hole in the wall between the right and left atria, enabling blood flow to mix.

The sinoatrial (SA) node, which initiates heartbeat and sets the heart rate.

A heart structure that receives electrical signals from the SA node and transmits them to the ventricles.

Pathways that connect the SA node to the AV node.

A pathway that carries electrical signals from the AV node to the ventricles.

Branches that further carry electrical signals to the left and right ventricles.

Specialized fibers that carry signals into the ventricular muscle walls to initiate contraction.

The circulation of blood to the heart itself, supplying oxygen and nutrients to the heart muscle.

The arteries that supply blood to the heart.

Major artery supplying blood to the left side of the heart, including most of the left ventricle, left atrium, and interventricular septum.

Branch of the left coronary artery, supplying blood to the anterior two-thirds of the interventricular septum, and part of the conduction system.

Branch of the left coronary artery, supplying blood to the left atrium and ventricle.

Blood vessels that supply oxygen-rich blood to the heart muscle (myocardium).

Collect deoxygenated blood from the myocardium.

Major cardiac vein that drains blood from the anterior heart.

Large vein that collects blood from various cardiac veins, returning it to the right atrium.

Area of the heart muscle (myocardium) supplied by each distinctive artery.

The pointed tip of the heart, located inferiorly and to the left.

The wider, upper portion of the heart, where the great vessels attach.

A groove on the front of the heart separating the left and right ventricles.

The upper right chamber of the heart receiving deoxygenated blood from the body.

The lower right chamber of the heart pumping deoxygenated blood to the lungs.

The upper left chamber of the heart receiving oxygenated blood from the lungs.

The lower left chamber of the heart pumping oxygenated blood to the body.

The tough outer layer of the pericardium, providing structural support and protection for the heart.

The inner layer of the pericardium, consisting of two layers (parietal and visceral) and a fluid-filled cavity.

The space between the parietal and visceral layers of the serous pericardium, filled with a small amount of lubricating fluid.

The innermost layer of the pericardium, directly attached to the heart tissue.

The portion of the pericardium not covered by the lung and pleura, located behind the lower sternum and 4th-6th costal cartilages.

A passageway between the inflow (superior vena cava, pulmonary veins) and outflow (aorta, pulmonary trunk) channels of the heart.

A recess posterior to the heart, located between the right and left pulmonary veins.

An abnormal accumulation of fluid in the pericardial cavity, often due to inflammation or other medical conditions.