Question
Identify the missing item in the blood pathway:
right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary artery → lungs → pulmonary veins → left atrium → ____ → left ventricle → aortic valve → aorta → arteries → arterioles → capillaries → venules → veins → venae cavae → right atrium
Answer
Identify the missing item in the blood pathway:
right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary artery → lungs → pulmonary veins → left atrium → mitral valve → left ventricle → aortic valve → aorta → arteries → arterioles → capillaries → venules → veins → venae cavae → right atrium
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