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.
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 blood vessels are classified into two types based on their thickness of blood vessels. They are arteries and veins. The arteries end in the capillaries and the veins start in the blood capillaries.
The sperm and Ovum plays an important role in fertilization. Production of sperm starts only after the puberty in males. Production of Ovum may start after birth, but ova Will be matured after puberty.