Brain is the best Controlling system

PID Controller

Lung is the best membrane

Membrane

Heart is the best pump

Gear-Oil Pump

Stomach is the best reactor

Plug-flow Reactor

Nerve is best sensor

D40 Sensor

Muscle is the best actuator

Electric Actuator

Intestine is the best sedimenter

Sedimenter

Blood vessel is the best pipe

Stainless Pipe

Kidney is the best heat exchanger

Plate Heat Exchanger

Indeed, human body is the best and most complex chemical plant!

“This day shall We save thee in the body, that thou mayest be a sign to those who come after thee! but verily, many among mankind are heedless of Our Signs!” (Yunus: 92)