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PowerPoint 4.3: The Organization of Living Things

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Information about PowerPoint 4.3: The Organization of Living Things

Published on October 23, 2007

Author: MissWander

Source: slideshare.net

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The Organization of Living Things Chapter 4 Section 3

Key Concept As multicellular organisms develop, their cells differentiate (change & separate) and form levels of organization Why it Matters : so Humans (we are multicellular) can have different kinds of cells, tissues, organs, and organ systems

As multicellular organisms develop, their cells differentiate (change & separate) and form levels of organization

Why it Matters : so Humans (we are multicellular) can have different kinds of cells, tissues, organs, and organ systems

Unicellular Organisms “ uni-” = one Prokaryotes are unicellular organisms Some algae, some protists , and some eukaryotes (yeasts), are unicellular Can still do everything they need to stay alive Benefits over multicellular organisms: Need fewer resources Can live in harsher conditions

“ uni-” = one

Prokaryotes are unicellular organisms

Some algae, some protists , and some eukaryotes (yeasts), are unicellular

Can still do everything they need to stay alive

Benefits over multicellular organisms:

Need fewer resources

Can live in harsher conditions

Multicellular Organisms “ multi-” = more than one Plants, animals , some protists, and most fungi are multicellular Start as a single cell  many cells  cells differentiate (change) into different types of cells  cells group together

“ multi-” = more than one

Plants, animals , some protists, and most fungi are multicellular

Start as a single cell  many cells  cells differentiate (change) into different types of cells  cells group together

Multicellular Characteristics Larger size = have less predators and have more options of things to eat Longer life – organism will continue to live even if a single cell dies Specialization – each type of cell has a specific job, making the organism more efficient

Larger size = have less predators and have more options of things to eat

Longer life – organism will continue to live even if a single cell dies

Specialization – each type of cell has a specific job, making the organism more efficient

Levels of Organization 1 st Level: Cells 2 nd Level: Tissues 3 rd Level: Organs 4 th Level: Organ Systems Cells  Tissues  Organs  Organ Systems

1 st Level: Cells

2 nd Level: Tissues

3 rd Level: Organs

4 th Level: Organ Systems

Cells  Tissues  Organs  Organ Systems

Level 1 : Cells Cells can be specialized (have a certain function) Function = job Function is related to the cell structure Structure = how parts of the cell are put together Shape Material it’s made from Structure of a brain cell is different from muscle cell

Cells can be specialized (have a certain function)

Function = job

Function is related to the cell structure

Structure = how parts of the cell are put together

Shape

Material it’s made from

Structure of a brain cell is different from muscle cell

Level 2: Tissues Tissue = group of cells that work together to do a specific job Ex: Heart muscle tissue is made of heart muscle cells Animals have 4 types of tissue: nerve, muscle, connective, protective Plants have 3 types of tissue : transport, protective, ground

Tissue = group of cells that work together to do a specific job

Ex: Heart muscle tissue is made of heart muscle cells

Animals have 4 types of tissue: nerve, muscle, connective, protective

Plants have 3 types of tissue : transport, protective, ground

Level 3: Organs Organ = structure that is made up of 2 or more tissues working together to get a specific job done Ex: Stomach – muscle tissue moves food, special tissues make chemicals to digest food, connective tissue holds stomach together, nervous tissue sends messages back and forth between the stomach and brain

Organ = structure that is made up of 2 or more tissues working together to get a specific job done

Ex: Stomach – muscle tissue moves food, special tissues make chemicals to digest food, connective tissue holds stomach together, nervous tissue sends messages back and forth between the stomach and brain

Level 4: Organ Systems Organ system = group of organs working together to perform a specific function Each organ system has a specific job Ex: Digestive system is made of several organs including the stomach and intestines

Organ system = group of organs working together to perform a specific function

Each organ system has a specific job

Ex: Digestive system is made of several organs including the stomach and intestines

Structure of Animals Cells -basic unit of an animal’s structure -become specialized _______________________________ Tissues -made of cells that work together to perform a specific function __________________________________________ Organs - made of different types of tissues that work together to perform a specific function ____________________________________________________ Organ Systems -made of organs that work together to perform a specific function _____________________________________________________________ Organisms

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