DIGESTION & MACROMOLECULES

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WHY DO WE NEED TO EAT?

• Our body is mostly water, but we cannot survive off just water and electrolytes/vitamins (from plasma)

• We need to eat FOOD for ENERGY (used for growing, healing, and daily functions)

WHY DO WE NEED TO EAT?

• Food is also made out of cells!!

BASICS of DIGESTION

• When we digest food, we break it down into smaller parts.

�  Our body rebuilds those smaller parts into the kinds of cells and things WE need.

�  This can easily be done because all living things are made of only four types of major big molecules!

WHAT ARE MACROMOLECULES?

• Macromolecules are large molecules. There are three major macromolecules that come from our food! • Macromolecules can be broken down even further… H

O H

In science, all things are made from smaller parts… LIKE THIS:

Organisms are made from small cells.

Cells are made from smaller parts called macromolecules.

NOTE: A macromolecule is a type of biological

POLYMER.

Macromolecules (POLYMERS) are made from smaller parts called monomers.

The human body’s monomers are made of five key elements: CHNOPS!!!

FYI: POLYMERS The science word for something made of small parts •  In this class, Polymer ó Macromolecule. •  Macromolecules are polymers! Megazord is a polymer!

When our body makes new polymers, this process is called POLYMERIZATION!

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Macromolecule AKA Polymer

Examples of Food

Function within the HUMAN body (and Notes)

Name of Monomer

Elements found in Monomer (CHNOPS?)

1. Carbohydyrates

2. Lipids AKA FATS

3. Proteins