Ch 13 Cardiovascular System

Question 1

describe the heart and its position in the body

Answer 1

the heart is located between the lungs and mediastinum

Question 2

name the four chambers of the heart

Answer 2

rt atrium
left atrium
rt ventricle
left ventricle

Question 3

myocardium

Answer 3

the wall of each heart chamber composed of cardiac tissue

Question 4

endocardium

Answer 4

a thin layer of smooth tissue lining each chamber

Question 5

name two layers of pericardium

Answer 5

visceral pericardium

parietal pericardium

Question 6

systole

Answer 6

heart contraction

Question 7

dystole

Answer 7

heart relaxation

Question 8

angina pectoris

Answer 8

sever chest pain as a result of inadequate oxygen

Question 9

stroke volume

Answer 9

the volume of blood ejected from the ventricle during each beat

Question 10

cardiac output

Answer 10

the volume of blood pumped by one ventricle per minute

Question 11

trace the path and name the structures involved in the conduction system of the heart

Answer 11

SA Node–>rt & lt atrium–>AV Nodes–>AV Bundle–>Subendocardial branches–>Ventricular Myocardium–>causing ventricles to contract

Question 12

describe the normal features of an ECG or EKG

Answer 12

normal ECG has three characteristics. P Wave, QRS Complex, and a T Wave

Question 13

three layers that make up arteries and veins

Answer 13

tunica externa, tunica media, and tunica intima

Question 14

four factors that influence blood pressure

Answer 14

blood volume, strength of heart contraction, heart rate, and thickness of blood

Question 15

describe Pulmonary and Systemic circulation (BEGINNING W/PULMONARY TO SYTSEMIC)

Answer 15

inferior and superior vena cava–>rt atrium–>tricuspid valve–>rt ventricle–>pulmonary SL valve–>pulmonary artery–>LUNGS–> left pulmonary vein–>left atrium–>bicuspid valve–>left ventricle–>aortic SL valve–>BODY