Heart Flashcards
arteries travel ____ the heart
away from
veins travel ____ the heart
towards
what are the 4 components of the circulatory/cardiovascular system?
heart, arteries, veins, capillaries
the heart sits within the ___ of the thorax
mediastinum
the heart sits ____ to the left and ___ to the right
2/3, 1/3
the base of the heart is at what landmark?
sternal angle (2nd rib)
the apex of the heart is at what landmark?
5th intercostal space
the apex of the heart is ____ facing
anteriorly
what is the anterior border of the heart?
right ventricle
what is the anterior border of the heart?
right ventricle
the right ventricle is the ____ border
anterior
the left ventricle is the ___ border
lateral
what is the lateral border of the heart?
left ventricle
what is the superior border of the heart?
right and left atria
the ___ and _____ are the superior border of the heart
right atria, left atria
what is the lining of the heart?
pericardium
the pericardium secretes ____ for ____
serous fluid, lubrication
what are the 3 layers of the pericardium?
fibrous, parietal, visceral
what are the 2 divisions of the serous pericardium?
parietal, visceral
what separates the parietal and visceral pericardium?
pericardial space/cavity
what is the term for the serous fluid filled space between the visceral and parietal pericardium?
pericardial space
what is the term for an accumulation of fluid in the pericardial space that prevents the heart chambers from expanding and filling?
cardiac tamponade
cardiac tamponade prevents the heart chambers from ___ and ____
expanding, filling
what is the outmost layer of the heart wall?
epicardium
the visceral pericardium is also known as what?
epicardium
what is the middle layer of the heart wall?
myocardium
the myocardium communications via what?
cell junctions called gap junctions/intercalated discs
what is the innermost layer of the heart wall?
endocardium
what is endocardium made of?
epithelium and subendothelial connective tissue
what are the two heart circuits?
pulmonary, systemic
what circuit involves the right chambers?
pulmonary
what circuit involves deoxygenated blood?
pulmonary
what circuit pumps to the lungs?
pulmonary
what circuit involves the left chambers?
systemic
what circuit is the strongest?
systemic
what circuit involves oxygenated blood?
systemic
what circuit pumps blood to the body?
systemic
what are the 3 veins that blood enter the right atrium through?
superior vena cava, inferior vena cava, coronary sinus
blood from the superior vena cava comes from the ___ ____
upper body
blood from the inferior vena cava comes from the ____ ____
lower body
blood from the coronary sinus comes from ____
myocardium
the posterior half of the right atrium is called the ___ _____
sinus venarum
what is the name of the sinus venarum during embryonic development?
sinus venosus
the anterior of the right atrium has texture called ___ _____
pectinate muscle
the pectinate muscle and smooth wall of the right atrium is separated by the ___ ______
Crista Terminalis
what sends blood into the pulmonary trunk that then goes into the lungs?
right ventricle
what receives oxygen poor blood that is eventually send to the lungs?
right atrium
the pulmonary trunk exits the heart at the ____
base
what structure provides structure and support to the ventricle walls?
trabeculae carneae
what is the cone shaped ventricular flow that conducts blood into the pulmonary trunk?
conus arteriosus (infundibulum)
what is the structure that connects papillary muscles to the cusps of the valves?
chordae tendinae
what structure extends from the interventricular septum to the anterior papillary muscle?
moderator band
what kind of fibers make up the moderator band?
nerve/Purkinje
nerve/Purkinje fibers carry ____ ____ for contraction of the heart from interventricular septum to anterior papillary muscle
electrical impulses
nerve/Purkinje fibers carry electrical impulses for contraction of the heart from ____ ____ to ___ ____ ____
interventricular septum, anterior papillary muscle
what receives oxygen rich blood?
left atrium
blood enters through 4 ___ ____ into the left atrium
pulmonary veins
the 4 pulmonary veins take blood from the ____ to the ___ ____
lungs, left atrium
the left atrium has ___ wall
smooth
from the inside of the left atrium, you can see the ___ _____
fossa ovale
the left atrium is lined with ___ _____
pectinate muscle