📘 Lesson 10: Lipids
🧪 What Are Lipids? (Definition)
Lipids are a group of organic (carbon-containing) molecules that do not dissolve in water. Instead, they can easily dissolve in organic solvents like alcohol or ether. This means they are non-polar – they don’t mix with water, which is polar.
💡 Real-Life Example:
Just think of oil and water. When you pour oil into water, it floats and doesn’t mix. That’s how lipids behave in our body too!
🧠 Simple Definition:
Lipids are water-repelling (non-polar), oily or fatty substances that are important for storing energy and building parts of cells.
🔍 Classification of Lipids
Lipids come in different types, based on their structure and function.
Here are the six major types:
- Acylglycerols – includes fats and oils.
- Waxes – found on skin, leaves, feathers for protection.
- Phospholipids – make cell membranes.
- Terpenes – include plant oils, essential oils.
- Steroids – hormones like testosterone, estrogen.
- Prostaglandins – chemical messengers in the body, especially for inflammation or pain.
🧠 Mnemonic to Remember Types of Lipids:
“All Wild Penguins Talk Silly Phrases”
- A – Acylglycerols
- W – Waxes
- P – Phospholipids
- T – Terpenes
- S – Steroids
- P – Prostaglandins
👉 Say it like a funny sentence: “All Wild Penguins Talk Silly Phrases” to help you recall the 6 types.