| Question |
Answer |
| Aorta |
the major systemic artery that recieves blood from the left ventricle. |
| Arteriole |
a small branch of an artery that communicates with a capillary network. |
| Artery |
thick-walled elastic vessels that carry blood AWAY from heart. |
| Atrium |
the chamber of the heart that recieves blood. |
| Capillary |
small blood vessels that connect an arteriole and a venule. |
| Cardiac Cycle |
a series of cardiac contractions and relaxations that constitute a complete heartbeat. |
| Cardiac Output |
volume of blood per minute pumped by the heart. |
| Diastole |
phase of a cardiac cycle when a heart chamber wall relaxes. |
| Electrical Event |
the electrical conduction of the heart as visualized on an EKG. |
| Endocardium |
the inner lining of the heart chambers. |
| Epicardium |
the visceral portion of the pericardium on the surface of the heart. |
| Ischemia |
the deficiency of blood to a body part. |
| Mechanical Event |
the muscular contraction of the heart that sends blood out of the heart. |
| Mitral Valve |
the heart valve between the left atrium and left ventricle; also known as the Bicuspid Valve. |
| Myocardium |
muscle tissue of the heart |
| Myocardial Infarction |
irreversible heart damage secondary to prolonged ischemia. |
| Pacemaker |
mass of specialized muscle tissue that controls the rythym of the heart. |
| What are the two major structures of the pace maker? |
Sinoatrial Node (SA) and the Atriaventricular Node (AV) |
| Stroke Volume |
amount of blood that each ventricle discharges in a heartbeat. |
| Systole |
phase of cardiac cycle when a heart chamber wall contracts. |
| Systemic Circulation |
movement of blood from the left ventricle throughout the body and back to the right atrium. |
| Vasoconstriction |
a decrease in the diameter of a blood vessel |
| Vein |
a vessel that carries blood TOWARD the heart. |
| The heart is a hollow and cone shaped muscular___. |
pump |
| The average adult heart is what size? |
14cm long and 9 cm wide |
| The heart is located in the ___. |
mediastinum |
| The base is the___portion of the heart. |
proximal |
| The base attaches the ____and lies beneath the 2nd rib. |
great vessels |
| The Apex of the heart... |
bluntly pointing leftward, lies on the diaphragm muscle, and is located at the 5th ICS. |
| Pericardium |
a serous membrane that surrounds the heart. |
| The wall of the heart is composed of... |
Three layers of muscle. |
| The layers of muscle in the wall of the heart are: |
Epicardium, Myocardium, and Endocardium. |
| The EPICARDIUM is the outer layer of the heart that reduces_____from the surrounding organs. |
Friction |
| Myocardium |
cardiac muscle tissue that makes up the bulk of the heart. |
| Endocardium |
lines all heart chambers and covers the heart valves. |
| Deoxygenated Blood returns to the heart via the |
superior and inferior vena cava. |
| Oxygenated blood returns from the lungs and enters the left atrium via the______. |
Pulmonary Veins |
| Bradycardia |
Steady contractions below 60 BPM |
| Ventricular Fibrilation |
a complete lack of organized electric impulses. |
| What happens when ventricular fibrilation occurs? |
BP falls to zero, unconsciousness, and DEATH! within 4 minutes. (BAD news for the home team :( ) |
| Blood Vessels in the heart have how many layers? |
THREE |
| Tunica Intima |
One of the three layers of a cardiac blood vessel AKA endothelium. |
| Tunica Media |
Smooth Muscle Layer, Thicker in Arteries, and Thinner in Veins. |
| Tunica Externa |
Thickest layer of the vein. |
| Arteries |
Thick-wall elastic vessels that carry blood AWAY from the heart. |
| Arterioles |
Smallest arteries |
| Caplillaries |
Smallest vessels |
| Venules |
Small thin-walled vessels |
| Veins |
Carry blood TOWARD the heart |
| Aorta is the LARGEST Artery with three segments: |
1.Aortic Arch2.Ascending Aorta3.Descending Aorta |
| Portal Circulation |
Carries blood drained from the stomach, intestines, and spleen to the liver. |
Mary Ercanbrack
on 2009-09-14
Ch.18 LTI-MA 509
