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Delta Modern Language Schools Urinary System
Science department
Grade 6
1st term 2024- 2025

They continuously clean and filter the blood up to 300 times a day, where:

•A large artery brings blood to each kidney.

1

•Tiny blood vessels branch off and pass through each nephron which
is a microscopic filter that filters the blood and removes harmful

2 substances from the body

• Removing urea which is formed due to the breakdown of

3 proteins inside the body cells.

• After the filtering is completed urea, other waste materials

4 and water become urine

• Urine leaves each kidney through a narrow tube called
ureter and collects in the bladder

5 • Urine is removed from the bladder through Urethra

Notes

1. Blood cells and proteins are too large to pass through the filter (nephron),
so they stay in the body.

Urination the process of expelling urine from the body

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