This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Kidney receives about …………… % of cardiac output - 
Select and explain. 
A. 5%, B. 10%, C. 15%, D. 20%
D: 20%
Answer: D: 20% 
Explanation: Total blood flow through various organs (whole organ)

Liver - 1500ml/min - 27.8% of cardiac output
Kidney - 1260ml/min - 23.3% of cardiac output
Skeletal muscle - 840ml/min - 15.6% of cardiac output
Brain - 750ml/min - 13.9% of cardiac output
Skin - 462ml/min - 8.6% of cardiac output
Heart - 250ml/min - 4.7% of cardiac output

Blood flow per unit mass in decreasing order –ml/100gm/min (Highest to lowest)

Kidney
Heart
Liver
Brain
Skin
Skeletal muscle