neutrophil
lymphocyte
monocyte
eosinophil
basophil
fibrous pericardium
serous pericardium
epicardium
myocardium
endocardium
right atrium
right ventricle
left atrium
left ventricle
superior vena cava
, inferior vena cava
pectinate muscles
tricuspid valve
bicuspid valve
right pulmonary veins (two veins on opposite side from arrow)
left pulmonary veins
pulmonary trunk
pulmonary (semilunar) valve
papillary muscles
chordae tendineae
aortic valve
aorta
brachiocephalic trunk
tunica interna (intima)
tunica media