7-4 the diversity of cellular life · title: chapter07_section04_edit.ppt author: krista vander...
TRANSCRIPT
End Show
Slide 2 of 30
Copyright Pearson Prentice Hall
7-4 The Diversity of Cellular Life
End Show
7-4 The Diversity of Cellular Life
Slide 3 of 30
Copyright Pearson Prentice Hall
7-4 The Diversity of Cellular Life
The differences among living things arise from the ways in which cells are specialized to perform certain tasks and the ways in which cells associate with one another to form multicellular organisms.
End Show
7-4 The Diversity of Cellular Life
Slide 4 of 30
Copyright Pearson Prentice Hall
Unicellular Organisms
Unicellular Organisms
Unicellular organisms are made up of only one cell.
Unicellular organisms dominate life on Earth.
End Show
7-4 The Diversity of Cellular Life
Slide 5 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Multicellular Organisms
Organisms that are made up of many cells are called multicellular.
There is a great variety among multicellular organisms.
End Show
7-4 The Diversity of Cellular Life
Slide 6 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
What is cell specialization?
End Show
7-4 The Diversity of Cellular Life
Slide 7 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Cells throughout an organism can develop in different ways to perform different tasks.
This process is called cell specialization.
End Show
7-4 The Diversity of Cellular Life
Slide 8 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Specialized Animal Cells
Animal cells are specialized in many ways.
End Show
7-4 The Diversity of Cellular Life
Slide 9 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Red blood cells transport oxygen.
End Show
7-4 The Diversity of Cellular Life
Slide 10 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Cells in the pancreas produce proteins.
End Show
7-4 The Diversity of Cellular Life
Slide 11 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Muscle cells allow movement.
End Show
7-4 The Diversity of Cellular Life
Slide 12 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Specialized Plant Cells
Plants exchange carbon dioxide, oxygen, water vapor, and other gases through tiny openings called stomata on the undersides of leaves.
Highly specialized cells, known as guard cells, regulate this exchange.
End Show
7-4 The Diversity of Cellular Life
Slide 13 of 30
Copyright Pearson Prentice Hall
Multicellular Organisms
Stomata enclosed by guard cells.
End Show
7-4 The Diversity of Cellular Life
Slide 14 of 30
Copyright Pearson Prentice Hall
Levels of Organization
What are the four levels of organization in multicellular organisms?
End Show
7-4 The Diversity of Cellular Life
Slide 15 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Levels of Organization
The levels of organization in a multicellular organism are: • individual cells • tissues • organs • organ systems
End Show
7-4 The Diversity of Cellular Life
Slide 16 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Levels of Organization
Smooth muscle tissue Muscle cell Stomach Digestive system
End Show
7-4 The Diversity of Cellular Life
Slide 17 of 30
Copyright Pearson Prentice Hall
Levels of Organization
In multicellular organisms, cells are the first level of organization.
End Show
7-4 The Diversity of Cellular Life
Slide 18 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Tissues
Similar cells are grouped into units called tissues.
A tissue is a group of similar cells that perform a particular function.
End Show
7-4 The Diversity of Cellular Life
Slide 19 of 30
Copyright Pearson Prentice Hall
Levels of Organization
End Show
7-4 The Diversity of Cellular Life
Slide 20 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Most animals have four main types of tissue:
• muscle
• epithelial
• nervous
• connective
End Show
7-4 The Diversity of Cellular Life
Slide 21 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Organs
Organs are groups of tissues that work together to perform a specific function.
End Show
7-4 The Diversity of Cellular Life
Slide 22 of 30
Copyright Pearson Prentice Hall
Levels of Organization
End Show
7-4 The Diversity of Cellular Life
Slide 23 of 30
Copyright Pearson Prentice Hall
Levels of Organization
Organ Systems
In most cases, an organ completes a series of specialized tasks.
A group of organs that work together to perform a specific function is called an organ system.
End Show
7-4 The Diversity of Cellular Life
Slide 24 of 30
Copyright Pearson Prentice Hall
Levels of Organization