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Understanding the Urinary System: Functions and Waste Disposal

In today's lesson, we explore the human urinary system and its critical role in waste disposal. From the kidney's function of filtering blood to the bladder's storage of urine, students will illustrate and label a diagram of the system. We discuss how our bodies eliminate carbon dioxide through exhaling, solid waste as feces, and excess water via sweat and urine. Additionally, the lesson emphasizes the importance of proper waste management in our bodies and the potential consequences of a bladder rupture, prompting engaging discussions with partners.

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Understanding the Urinary System: Functions and Waste Disposal

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  1. Today is Wednesday, October 10, 2012 • Homework: NONE • Warm Up: • With your SHOULDER PARTNER, DISCUSS THE FOLLOWING: • How is the garbage from your house disposed of? • What are some different types of garbage in our bodies that need to be disposed of? How does our body dispose of them?

  2. Bodily Waste: • Carbon dioxide – exhaling • Solid waste – feces • Excess water – sweat, urine • Trash in our bodies (blood) is filtered through our kidneys, which cleans the blood by removing these waste products. Filtered, clean blood goes back to heart and lungs; waste goes to bladder.

  3. Objective: TLW demonstrate an understanding of the urinary system by illustrating and labeling a diagram. Standard:Life Science: Students know the role of the kidney in removing cellular waste from blood and converting it into urine, which is stored in the bladder.

  4. Renal Artery: carries blood to kidney.

  5. Kidney:filtersthe blood. • Filters and removes waste products like water, extra nutrients, salts, calcium, ammonia , (harmful compound formed during digestion of proteins), urea, (harmful compound formed during the metabolism of protein), etc.

  6. Renal Vein: carries clean blood back to the heart.

  7. From the kidney, waste (now called urine) travels through the ureter to the . . .

  8. Bladder!!!!! • This is the storage area for urine until it is expelled from the body

  9. Pause and Think About it…. • Discuss with your FACE PARTNER: • Why could you easily die from a burst bladder?

  10. Urine is expelled out of body through the urethra. • Yes, both boys AND girls have a urethra • It looks the same on the inside of the body

  11. Fact! Your kidneys send about 6 cups of urine to your bladder every day!

  12. Right now: • Draw a picture of the human urinary system in your notebooks and write down below it one new thing you learned today.

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