5th grade ch. 2 lesson 2 how do cells work together?
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Ch. 2Lesson 2
How do cells work together?
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cells
tissues
organs
shape-specialized to fit its job
Group of cells working together doing same job
ex: groups of nerve cells= nerve tissue
Tissues working together
ex: heart, eyes
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Examples of cells:
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The shape of nerve cells makes them great for communicating signals between the brain and the body.
1. Branching cells
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2. Flat cells such as skin cells, often join or overlap to cover a surface.
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The smooth shape of red blood cells helps them move easily
through blood vessels to carry oxygen to the body.
3. Round Cells
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sickle cell anemiasickle cell anemia
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• When a friend whispers in your ear, sound waves cause many parts of your ear to vibrate.
• This causes hair-like structures on cells in your inner ear to bend and send nerve signals to the brain.
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4. Muscle cells4. Muscle cells have long fibers made of protein. Many cells work
together in bundles, making the muscle strong.
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Quick! What's the
biggest organ in your body?
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skin cells• Form in many layers• New cells form push out old
layers• Protects inside of body• Keeps out germs• Regulates water
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skin• Contains skin cells, nerve tissue,
blood vessels, oil glands, sweat glands & muscle tissue
• Sweat evaporates-cools you off• Outer layer-made up of dead cells
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You are likely to shed 40
pounds of skin in a lifetime.
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• Right now there are over a million dust mites, microscopic
critters invisible to the naked eye, on your mattress and pillow,
chomping on the dead skin cells that fell off
you last night!
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Tastes like
chicken!
Yummy!
What’s for
dessert?
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Name that cellName that cell
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Branching cells
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Round Cells
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Flat cells
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Muscle cells
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skin cells• Form in many layers• New cells form push out old
layers• Protects inside of body• Keeps out germs• Regulates water