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Blood Flow in Mammals and Reptiles

Which sequence of blood flow can be observed in either a reptile or a mammal?

a) vena cava -- right atrium -- ventricle -- pulmonary circuit

b) right ventricle -- pulmonary vein -- pulmocutaneous circulation

c) right atrium -- pulmonary artery -- left atrium -- ventricle

d) left ventricle -- aorta -- lungs -- systemic circulation

e) pulmonary vein -- left atrium -- ventricle -- pulmonary circuit

Solution Preview

(a) is correct because blood flows from the venae cavae into the right atrium. From there, it goes into the right ventricle, and then into the pulmonary circuit. ...