Nutrition

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Slide 1

Aim: How can we describe the types of

nutrition in living things?

Do now:

1. What is nutrition?

2. Why do living things need nutrition?

Slide 2

Nutrition:

How an organism gets food

(nutrients, organic compounds) and makes it available to the cells.

Nutrients:

useful portion of food:

-sugar

-amino acid

-fat

-starch

Organic Compounds =

FOOD!!!!!!

Slide 3

2 TYPES OF NUTRITION

1. Autotrophic nutrition –

Auto (self)

trophic (refers to feeding and nutrition)

“Self feeding.”

-Organisms that make their own organic compounds

ex. Photosynthesis

Chemosynthesis

Slide 4

a. Photosynthesis

Photo (light)

synthesis (creating, making)

-Light is the source of energy for the production of food.

-“Who?”

ex. Plants

Slide 5

Autotrophs

Slide 6

b. Chemosynthesis –

Chemo (chemical)

synthesis (creating, making)

-Chemical activity is the source of energy

for the production of organic compounds.

Who?

-organisms in environments that do not

rely on the sun to make food.

ex. Deep sea organisms

Slide 7

Photosynthesis

Chemosynthesis

Slide 8

Chemosynthetic nutrition

Deep sea tube worms and

arthropod

Slide 9

So far…

Nutrition:

Autotrophic:

a. photosynthesis

b. chemosynthesis

Autotrophs –

Organisms that can make their own food

by photosynthesis or chemosynthesis.

Slide 10

2. Heterotrophic nutrition –

Hetero: other

trophic: (refers to feeding and nutrition)

“Fed by others.”

- Heterotrophs: Organisms that eat

organic compounds made by others.

ex. Animals or animal-like protists

called protozoa: amoeba, paramecium.

Proto (first)

zoa (animal, zoo)

Slide 11

Examples of heterotrophs

paramecium

Slide 12