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Cardiovascular System
The Heart
33
Anatomy
Undergraduate 1
09/23/2007

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Cards

Term
The Heart lies in the mediastinum, which is?
Definition
a mass of tissue that extends from the sternum to the vertebral column between the lunds.
Term
Pericardium
Definition
membrane that protects and surrounds the heart.
Term
the pericardium consists of two main parts , what are they?
Definition
fibrous pericardium and serous pericardium.
Term
Fibrous Pericardium
Definition
the "bag" that rests on and attaches to diaphragm, prevents over stretching , protection and anchors heart with in mediastinum
Term
Serous Pericardium
Definition
-visceral (epicardium) adheres to surface of heart,
-pericardial fluid, which reduces friction between membranes as heart moves.
Term
Name three layers of heart.
Definition
epicardium, myocardium, and endocardium
Term
epicardium
Definition
thin transparent outer layer of the heart wall.
Term
myocardium
Definition
cardiac muscle tissue, forms bulk of heart and pumping action.
Term
endocardium
Definition
thin layer of endothelium overlying a thin layer of connective tissue. smooth lining for chambers, and covers valves of heart
Term
The heart is composed of four chambers, what are they?
Definition
the right and left atria (atrium) and right and left ventricles.
Term
Interventricular Septum
Definition
seperates the right and left ventricle.
Term
Right atrium receives blood from what three veins?
Definition
superior vena cava, inferior vena cava and coronary sinus.
Term
tricuspid valve
Definition
blood passes from the right atrium to the left ventricle through a valve that is called;
Term
pulmonary valve
Definition
blood passes through what valve into a larger artery called the pulmonary trunk, which divides into right and left pulmonary arteries.
Term
pulmonary veins.
Definition
the left atrium receives blood from the lungs through four what?
Term
bicuspid (mitral) valve
Definition
blood passes from the left atrium to the left ventricle through this.
Term
aortic valve
Definition
blood passes from the left ventricle through this into the ascending aorta
Term
fibrous skeleton of heart
Definition
prevents overstretching of the valves as blood passes through them.
Term
atroventricular valves
Definition
because they are located between an atrium and ventricle, the tricuspid and bicsupid valves are termed this.
Term
coronary circulation
Definition
how the heart supplies blood.
Term
coronary arteries
Definition
branch from the ascending aorta and encircle the heart.
Term
left coronary artery location
Definition
inferior to left auricle.
Term
left coronary artery divides into
Definition
anterior interventricular and circumflex branches
Term
right coronary artery
Definition
small artery branch to right atrium, AND continues inferior to right atrium
Term
right coronary artery branches into what branches?
Definition
posterior interventricular and marginal branches
Term
coronary veins
Definition
after blood passes through the arteries into the capillaries and then moves into the ?
Term
coronary sinus
Definition
has no smooth muscle to alter diameter,deoxyegenated blood in this empties into the right atrium
Term
great cardiac vein is located and does what?
Definition
in the interventricular sulcus. and drains the areas of the heart supplied by the left coronary artery.
Term
middle cardiac vein
Definition
posteroir interventricular sulcus and drains the areas supplied by the posterior interventricular branch and right coronary artery. (left and right ventricles.)
Term
small cardiac vein
Definition
in the coronary sulcus and drains the right and left atrium.
Term
small cardiac vein
Definition
in the coronary sulcus and drains the right and left atrium.
Term
anterior cardiac vein
Definition
drains the right ventricle and open directly into the atrium
Term
myocardial infarction
Definition
heart attack, complete obstruction to blood flow in a coronary artery.
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