lesson 4 - muscles.notebook · lesson 4 muscles.notebook june 03, 2020 muscles are attached to...
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Lesson 4 muscles.notebook June 03, 2020
Science
Lesson 4 muscles
Lesson 4 muscles.notebook June 03, 2020
Recap:
What is a vertebrate?
What is an invertebrate?
Lesson 4 muscles.notebook June 03, 2020
What are the names of the bones in our arm?
Lesson 4 muscles.notebook June 03, 2020
Lesson 4 muscles.notebook June 03, 2020
How do skeletons move?
Lesson 4 muscles.notebook June 03, 2020
How do your muscles work?
Muscles needed for movement
Muscle pairs
Lesson 4 muscles.notebook June 03, 2020
Lesson 4 muscles.notebook June 03, 2020
Muscles are attached to bones by tendons and help them to move.
When a muscle contracts (bunches up), it gets shorter and so pulls on the bone it is attached to. When a muscle relaxes, it goes back to its normal size.
Muscles can only pull and cannot push. Therefore muscles have to work in pairs to move a joint. One muscle will contract and pull a joint one way and another muscle will contract and pull it the other.
Lesson 4 muscles.notebook June 03, 2020
Lesson 4 muscles.notebook June 03, 2020
Task: Create a model of an arm showing the muscles.
skin
bone
muscle
bicep
tricep
joint
Lesson 4 muscles.notebook June 03, 2020
Muscles needed in exercise