VIRUSES

KINGDOMS Animal Plant Fungi Protoctist Monera

CHARACTERISTICS

Eukaryotic

Pluricellular

Tissues

heterothroph

s

Eukaryotic

Pluricellular

Tissues

Autotrophs

Eukaryotic

Pluricellular

heterothroph

s

Eukaryotic

Unicellular or

pluricellular

Prokaryotic

Unicellular

EXAMPLES

Let’s remember

Viruses are different

They are not animals

Viruses are different

They are not animals

They are not plants

Viruses are different

They are not animals

They are not plants

They are not fungi

Viruses are different

They are not animals

They are not plants

They are not fungi

They are not protozoa

Viruses are different

They are microscopic, as in Monera kingdom, but they are not Moneras

They are not animals

They are not plants

They are not fungi

They are not protozoa

What are Viruses?

VIRUS CELLLIVING THING

WHY?

Let’s remind

Vital functions:• Nutrition• Interaction• Reproduction

ONLY BY HELP OF ONLY BY HELP OF OTHER CELLSOTHER CELLS

Virus Characteristics

They are not cells They are extremely small (only can be seen through an electron microscope) They are unable to move They have an extensive habitat (ground, air and water)

They cannot carry out any vital funtion by themselves, so they infect living cells to carry out the reproduction (obligate parasites).

Parts of a virus

NUCLEIC ACID

CAPSID* VIRAL

ENVELOPE

Infection process

11

22

33

44

The virus enters the cell

Reproduction: viruses use the infected cell for making the viral components

Assembly of viral components

New viruses leave the cell

What are infectious diseases?

Pathogenic microorganis

m• bacterium• protozoon• virus• fungus

Living thing

Illness

Steps of Infection

1. Contagion 2. Incubation 3. Illness

Period between the invasion and the first symptoms

VECTORVECTORS?S?

Fighting against infectionsHygienHygien

eeVaccinVaccineses

AntibiotAntibioticsics

Wash hands before eating

Wash fresh fruit and vegetables

Weakened, dead or incomplete

microorganisms

Cannot produce illness

Teach the body how to fight against microorganisms

Produced by certain bacteria and fungi

(also artificially produced)

Prevent microorganisms

from growing

Do not work with viruses

Are all microorganisms harmful?All viruses are pathogenicAll viruses are pathogenic

A few bacteria, protozoa and microscopic fungi A few bacteria, protozoa and microscopic fungi as wellas well

Antibiotic production

Intestinal flora vitamin

production

Plankton

Decomposers / Producers

Food productionBENEFIBENEFI

TSTS