Describe the role of skeletal muscles in body movement.

Skeletal muscles are anchored to bones and work in teams to position and move our bodies. They contract and relax, causing the skeleton to move.

Explain the difference between an agonist and an antagonist muscle.

An agonist muscle contracts to pull a section of the skeleton into a new arrangement, while an antagonist muscle relaxes to allow for a controlled change in position. Their roles reverse when the bone moves back.

What is the role of the nervous system in muscle contraction?

The nervous system sends impulses down motor neurons to muscles, triggering changes in the chemistry of muscle fibers and causing them to contract.

Skin, Bone, and Muscle Under the Microscope

7th GradeScience40 min

Learning Objective

I can describe the differences between skin, bone, and muscle tissues when viewed under a microscope.

Lesson Flow

Watch Video

7 min

The Major Muscles of the Human Body | Science | ClickView

ClickView

Guided Notes

8 min

Key concepts students will learn:

•
Skeletal muscles are anchored to bones by tendons, which are made of connective tissue.
•
Muscles work in teams; the agonist contracts to move a section of the skeleton, while the antagonist relaxes to allow the movement.
•
Muscle contractions are powered by the interaction of myosin and actin within sarcomeres, requiring energy from respiration.

Practice

12 min

7 questions • Multiple choice & Short answer

Exit Ticket

5 min

“Describe how muscle tissue looks under a microscope, according to the video.”

Teacher Guide

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Answer keys for all questions
Differentiation strategies
Extension activities
Printable student handouts

Skin, Bone, and Muscle Under the Microscope

Learning Objective

Lesson Flow

Watch Video

Guided Notes

Practice

Exit Ticket

Teacher Guide

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