Which of the Following is the Correct Sequence of Blood

Question

Which of the following is the correct sequence of blood flow in reptiles and mammals?
A) left ventricle → aorta → lungs → systemic circulation
B) right ventricle → pulmonary vein → pulmocutaneous circulation
C) pulmonary vein → left atrium → left ventricle → pulmonary circuit
D) vena cava → right atrium → right ventricle → pulmonary circuit
E) right atrium → pulmonary artery → left atrium → ventricle

Accepted Answer

The correct sequence of blood flow in reptiles and mammals starts with the vena cava, which brings deoxygenated blood into the right atrium. From the right atrium, blood moves to the right ventricle, and then it is pumped into the pulmonary circuit (lungs in mammals) for oxygenation. This sequence accurately describes the initial stages of systemic circulation and pulmonary circulation in these animals.