Excretion

Excretion is the way of removing waste products from your body. The liver filters wastes from the blood and converts them into urea. Urea is then carried to the kidneys for excretion. Each kidney contains Nephrons which help the kidney separate wastes from nutrients.

1. Blood enter the kidney through an artery and flows into capillaries
2. Sugars, salts, water, urea, and other wastes move from the capillaries to tiny nephrons, which sort out wastes from the useful nutrients
3. The nutrients return to the blood and flow back out through veins
4. Urea and other wastes become urine, which flow threw the ureters and stored in the bladder until it flows through the sperm ducts to the penis.