1. Lipids

2. Mostly carbon and hydrogen Fats, oils, and waxes Can be used to store energy  Also, part of cell membrane, and waterproof coverings, steroids, and hormones. Made of Fatty acid tails and glycerol heads

3. Lipids Six functions of lipids: 1.Long term energy storage 2.Protection against heat loss (insulation) 3.Cushion organs 4.Protection against water loss 5.Chemical messengers (hormones) 6.Major component of cell membranes

6. Lipids Look at the structures of the fatty acids and explain the differences between saturated, unsaturated and polyunsaturated fats.

8. Fats in Organisms 8 Saturated fats are solids at room temp (animal fat, butter, shortening)

9. Fats in Organisms 9 Unsaturated fats are liquids at room temp (plant oils) http://www.youtube.com/watch?v=3xF_LK9pnL0