respiratory

Question 1

s/a node

Answer 1

starts each heart beat and sets the pace for the entire heart.

Question 2

purkinje fibres

Answer 2

conveys action potential throughout the ventricular walls resulting in a wringing contraction of the ventricle

Question 3

A/V node

Answer 3

action potential delayed briefly , for an atria to finish contracting.

Question 4

internodal pathway

Answer 4

link between the sa and av node

Question 5

a/v bundle

Answer 5

transmits action potentials rapidly from av node partway along the intraoventricular septum.

Question 6

bundle branches

Answer 6

splits into2 branches, conveying impulses along the intraventricular septum

Question 7

endocardium

Answer 7

the lining of the inner surface of the heart

Question 8

second heart sound

Answer 8

occurs when semi-lunar valves close at the end of the systole

Question 9

veins

Answer 9

vessels that carry blood back to the heart

Question 10

myocardium

Answer 10

striated muscle fibres under involuntery control

Question 11

chordae tendinae

Answer 11

heart strings- anchor the valve cusps to the ventricular wall

Question 12

semi-lunar valves

Answer 12

prevents blood flowing into the ventricles during diastole

Question 13

atrioventricular valves

Answer 13

prevents blood flowing back into atria during systole

Question 14

The heart

Answer 14

-the heart is a involuntry muscular pump- it contains a one way valve sytem and its purpose is to generate pressure which moves blood.

Question 15

Heart diagram

Answer 15

-when referring to left and right side of heart on diagram-hold diagram against heart and then use normal lest and rights.