Excretion is the way your body throws away waste — things it doesn't need anymore. Just like a dustbin in your house!

🚿 Why is Excretion Important?

If your body didn’t remove waste, it would be like keeping garbage in your room forever — stinky, dirty, and it can make you sick! So, excretion helps your body stay clean and healthy.

🧩 Parts of Excretion (The “Clean-Up Team”)

Here are the main parts of your body that help with excretion and what each one does:

1️⃣ Kidneys

🔹 What it does:Like water filters — they clean your blood.

🔹 Waste removed:Make urine (pee) by removing extra water, salts, and harmful chemicals.

🔹 How it goes out:Kidneys → Ureters → Urinary Bladder → Urethra → Pee 🚽

2️⃣ Lungs

🔹 What it does:Help you breathe.

🔹 Waste removed:Carbon dioxide gas (CO₂) — the bad gas made inside your body.

🔹 How it goes out:You breathe it out every time you exhale 😮‍💨

3️⃣ Skin

🔹 What it does:Cools your body down and removes waste.

🔹 Waste removed:Sweat — water, salt, and some urea.

🔹 How it goes out:Tiny holes in your skin called pores let sweat come out 💧

4️⃣ Liver

🔹 What it does:Cleans harmful stuff in your blood and breaks down bad things like old red blood cells, drugs, and poisons.

🔹 Waste removed:Sends broken-down waste to intestines or to kidneys.

5️⃣ Large Intestine

🔹 What it does:Removes undigested food.

🔹 Waste removed:Poop (faeces) — the leftover food your body couldn’t use.

🧠 Extra Tip:

• This process is different from egestion (egestion is just the removal of undigested food — poop).

• Excretion is all about removing waste made by your cells (like pee, sweat, CO₂).

  
  

• 💩 Why Pooping is Not Called Excretion

  Okay, so even though pooping gets rid of waste from your body, science doesn't call it excretion. Instead, it’s called egestion.

  
  

  🌟 What’s the Difference?

  Let’s imagine your body is a factory. Factories have workers inside making stuff, and they also get deliveries of things from outside.

  Now, two kinds of waste happen:

  
  

  1. Inside waste: This is waste made by the workers inside the factory. Like smoke, chemicals, or leftover stuff.👉 Your body does this too — like making pee, sweat, and bad air (carbon dioxide).

     This is called excretion.

     
     

  2. Outside waste: Imagine the factory got a delivery of bananas, but some bananas were too hard to use. The factory just throws them out without using them.

     👉 This is like when you eat food, and your body can’t digest some parts, so it just pushes them out as poop.

     This is called egestion, not excretion — because that food was never really used by your body. It just passed through

  3. 
     

• 🎯 So remember:

  • Pee, sweat, and breath out = Excretion (waste made inside your body)

  • Poop = Egestion (food waste that your body couldn’t use)