1. DAVID ADAIR FERNÁNDEZ MORGAN
ASAEL MIGUEL LÓPEZ
OMAR JIMÉNEZ COCA
ISRAEL FERNÁNDEZ DOMÍNGUEZ
Lipids

2. WHAT ARE THEY?
•Water insoluble compunds usually composed of an
alcohol and one or more carboxylic acid molecules.
•They include: Animal fats, vegetable oils and waxes.
Fats and oils are esters of glycerol, an alcohol that contains
3 (OH) Groups.

3. Each molecule of a fat or an oil contain three ester groups resulting
from the 3 carboxylic acid molecules joined to one glycerol
molecule.

4. FUNCTIONS OF LIPIDS!
•They have two major biochemycal roles in the
body:
•Store excess energy when an organism
porcesses more food than it needs.
•Form membranes surronding cells and
components

5. Clasification of lipids
• Lipids are divided in two groups:
Simple lipids Complex lipids
Phospholipids Vegetable oils
Glucolipids Waxes
Esteroids Fats
Cromolipids

6. PHOSPHOLIPIDS
• Glyceride found in living cells and cell membranes. They have
two fatty acids esterified to glycerol. has an ionic “head” soluble
in water, and a “tail” that is insoluble.

7. GLUCOLIPIDS
• Components formed by a carbohydrate that can be glucose or
galactose, and a fatty acid and an alcohol. Other words lipids
that contain D-glucose.

8. STEROIDS
• A lipid with a four-ring structure. Include cholesterol, sex
hormones, vitamine D and bile salts.

9. OILS AND FATS
• Contain fatty acids, fats have small percentage of unsaturated
fatty acids, oils contain few saturated fatty acids.
• A liquid lipid obtained from a plant source its called an oil.

10. • A semisolid lipid obtained from an animal source is called a fat.
• The distinction of a fat and an oil is based on the saturation of the
fatty acids.

11. WAXES
• Obtained from heavy crude oil. Its a mixture of a long
chain alkanes. A lipid wax is a mixture of naturally
ocurring esters of fatty acids and long chains alcohols.

12. INTERNET REFERENCES
• http://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/lipid
s.htm
• http://www.chem4kids.com/files/bio_lipids.html