Central nervous system (CNS) Controls the voluntary functions like walking, laughing, reading, etc. and Peripheral nervous system (PNS) is responsible for the involuntary actions like blinking of eye, heartbeat, digestion of food, etc.
The natural kidneys are responsible for the excretion of nitrogenous waste products produced in the body. Artificial Kidney is the man made a device to replace the kidney in case of kidney failure in humans.
Mitosis and Meiosis are the two phases of the nuclear cell division. There are four phases in mitosis, four phases in meiosis-1 and another four phases in meiosis-2 which results in the successful cell division.
The Pheromones and Hormones are the chemical substances which are totally different in their functions. The pheromones act outside of the body of the animal or insect secreting it. The hormones act inside of the body of the animal or human being secreting it.