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32 terms

The Heart Vocab 1

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Systemic circuit
carries blood to the body from the heart
Pulmonary circuit
carries blood to the lungs from the heart
arteries
blood vessels that carry blood away from the heart
capillaries
blood vessels found between small arteries and small veins
sternum, left
The heart is located posterior to the _______ and _______ of the midline
base
the top of the heart
apex
inferior pointed tip of the heart
Pericardial cavity
contains the air space and fluid that reduces the friction between the surfaces of the heart as it beats
pericardium
the lining of the cavity that contains the heart
visceral pericardium
corresponds to the inner wall of the pericaridal sac
parietal pericardium
corresponds to the outer wall of the sac
epicardium
covers the outer surface of the heart
myocardium
muscular wall of the heart that contains muscle tissue, blood vessels and nerves
endocardium
inner surface of the heart that includes the heart valves
tricuspid valve
valve found between the right atrium and right ventricle
pulmonary semilunar valve
valve that consists of three moon shaped flaps that assist blood flow from the right ventricle to the pulmonary trunk
chordae tendinae
connective tissue that attach to each cuspid, assists the valves closing during contraction
papillary muscles
conical muscular structure that holds the chordae tendinae in place
forman ovale
depression found between the atriums, remnant of the hole in the heart of the embryo that closes 2 days after birth
pectinate muscles
muscular ridges in the inner surfaces of the right atrium
trabeculae carnea
muscular ridges in the inner surfaces of the ventricles
superior vena cava
vein that delivers blood to the right atrium from the upper body
inferior vena cava
vein that delivers blood to the right atrium from the lower body
interatrial septum
wall that separates the two atriums
interventricular septum
wall that separates the two ventricles
Coronary sinus
vein that empties into the right atrium that carries deoxygenated blood from the heart
veins
carry blood to the heart
Atrioventricular valves
tricuspid and bicuspid
Pulmonary artery
carries blood to the lungs
aortic semilunar valve
allows blood to pass through to the ascending aorta
ascending aorta
blood is delivered to from the left ventricle
aortic arch
delivers blood from the ascending aorta to the descending aorta