chapter 11 anatomy

parts of intrinsic conduction system

parts of intrinsic conduction system

superior vena cava, sinoatrial node, atrioventricular node, right atrium, bundle branches, purkinje fibers, left atrium, atrioventricular bundle, interventricular septum

right atrium

blood enters

left atrium

blood enters

right ventricle

blood leaves the heart

left ventricle

blood leaves the heart

atrioventricular valve

between atria and ventricles

bicupsid valve

left side (2 flaps)

tricuspid valve

right side (2 flaps)

semilunar valve

between ventricle and artery (3 flaps)

superior vena cava

large vein that carries blood from veins superior to diaphragm back to right atrium

veins

carry blood back to heart ; oxygen poor blood

arteries

carry blood away from heart ; oxygen rich blood

exceptions to carrying blood

pulmonary arteries and pulmonary veins

internal conduction system

SA node, AV node, bundle of his, bundle branches, purkinje fibers

bradycardia

less than 60 beats/min

tachycardia

more than 100 beats/min

lup

first sound, louder and longer, closing of AV valves

dup

second sound, short and sharp, closing of semilunar valves

stroke volume

volume of blood pumped by each ventricle in one contraction

general path of blood flow

atria throught the ventricles and out the great arteries leaving the heart

layers of blood vessel wall

tunica intima, tunica media, tunica externa

carotid artery

the brain - it supplies cerebrum

umbilical vein

blood rich nutrients and O2 to the fetus

pulmonary arteries

blood from heart to lungs

which part of the internal conduction system supplies the walls of the ventricles?

purkinje fibers

what is the pacemaker of the heart?

sinoatrial node

systole

contraction

diastole

relaxation

drop of blood starting in right atrium and returning to right atrium

deoxygenated blood in right atrium which then goes to deoxygenated blood through the pulmonary tricuspid valve to deoxygenated blood in the right ventricle, and then deoxygenated blood through the pulmonary semilunar valve, to deoxygenated blood in the pulmonary trunk to deoxygenated blood in the pulmonary capillaries in the lungs

drop of blood starting in right atrium and returning to right atrium pt 2

oxygenated blood in the pulmonary veins to oxygenated blood in the left atrium to oxygenated blood through the bicuspid valve to oxygenated blood in the left ventricle, to oxygenated blood through the aortic semilunar valce, to oxygenated blood in the aorta, to oxygenated blood in the systemic arteries, to oxygenated blood in the systemic arterioles, to oxygenated blood in the systemic capillaries, to deoxygenated blood in the systemic venules to deoxygenated blood in the systemic veins to deoxygenated blood in the superior and inferior vena cava to deoxygenated blood in the right atrium