Which of the following, regarding blood flow in mammals, is in the correct order?
a. Right atrium -> left atrium -> lungs -> left atrium -> left ventricle -> body
b. Right atrium -> right ventricle -> body -> left atrium -> left ventricle -> lungs
c. Right atrium -> lungs -> left ventricle -> left atrium -> body -> right ventricle
d. Right atrium -> right ventricle -> lungs -> left atrium -> left ventricle -> body
e. Right atrium -> right ventricle -> left atrium -> left ventricle -> lungs -> body
Answer: d. Right atrium -> right ventricle -> lungs -> left atrium -> left ventricle -> body