WHAT ARE ORGANIC COMPOUN

DS?Section 15-7

ORGANIC CHEMISTRY

Organic compounds

Study of organic compounds which are

compounds that contain C

C atom has 4 electrons in its outer ring, so it can

form 4 bonds with 4 other elements

All living things contain organic compounds

About 95% of all known substances are organic

compounds

Carbon atoms can form three different types of covalent bonds; a single bond, a double bond or a triple bond. This is why there are

many different organic compounds.

STRUCTURAL FORMULAS

A molecular model of an

organic compound

which shows the

arrangement of atoms.

WHAT COMPOUND

S ARE NEEDED BY

LIVING THINGS?

Section 15-8

ORGANIC COMPOUN

DS

All living things need organic compounds to stay alive. Most organisms get the

organic compounds from the food they eat. Most food is

made up of carbohydrates,

lipids and proteins.

CARBOHYDRATESOrganic compounds made up of C, H, and

O. Sugars and starches are examples. They give the body its main source of

energy. Foods like cereals, grains, vegetables, fruits, breads are good

sources.

LIPIDSOrganic

compounds made up mostly of C and H. Fats and oils are lipids. They are a secondary source of energy for the

body. Lipids can be stored by the body

for a later use. Butter, meat,

cheese, and nuts are good sources.

CHOLESTEROLCholesterol is a lipid. Animal fats contain

high cholesterol. High cholesterol is harmful to the body. It forms fatty deposits on the walls of blood vessels, which can restrict

blood flow.

PROTEINSOrganic compounds that are used to build and repair the body. The building blocks of proteins are amino acids which contain C,

H, O, and N. Milk, fish, eggs, and beans are good sources.