Muscle Power Guide Body Science
Why Are Muscles Important?
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The Big Idea
Your body has over 600 muscles! Muscles pull on your bones so you can move. They work 24 hours a day, even while you sleep.
4 Big Jobs Muscles Do Every Day
1. They Help You Move
Every step, jump, and smile needs muscles. When you run or write with a pencil, muscles pull on your bones like strong ropes!
Example: Kicking a soccer ball
2. They Pump Your Blood
Your heart is your hardest-working muscle. It pumps fresh blood and oxygen all the way from your brain to your toes.
Example: Your steady heartbeat
3. They Hold You Up
Without muscles, your body would flop to the floor! Your back, stomach, and neck muscles hold your skeleton straight so you can stand.
Example: Sitting tall in your chair
4. They Keep You Warm
When you feel cold, your muscles shake super fast (shivering). This shivering makes heat to keep your body safe and warm.
Example: Shivering on a cold morning
Power Words to Remember
Muscle Tough tissue that tightens and pulls to move your body.
Contract When a muscle squeezes tight to do work.
Heart A muscle that never stops pumping blood to your body.
Did You Know? It takes 12 face muscles to smile, but 43 to frown. Smiling is easier!
Hands-On Practice
Muscle Mission Lab
Student Worksheet
1 Try It Now: Body Checks
Check A
Arm Squeeze
Put your hand on your upper arm. Bend your elbow tight.
How does it feel?
Soft Hard
Check B
Heart Beat
Press your flat hand to the left side of your chest.
Do you feel the thumping?
Yes No
Check C
Deep Breath
Take a huge breath of air. Feel your ribs lift up.
Did your ribs move?
Yes No
2 Match the Job
Draw a straight line from each daily activity to the muscle job it uses.
A. Running across the playground
B. Shivering at a snowy bus stop
C. Pumping blood while you sleep
D. Standing up straight in line
Making warmth for your body
Moving your legs and feet
Holding your skeleton tall
Your heart working nonstop
3 My Favorite Muscle Move
What is your favorite activity that needs muscles? (Examples: dancing, basketball, swimming, video games, laughing)
Draw yourself doing the move
Finish this sentence:
"My favorite way to use my muscles is
because
Quick Check: Can you name one muscle that never stops working?
The H _ _ _ T
Big Muscles Worksheet Body Anatomy
Big Muscles in Your Body
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Your Body Builders
Some muscles are small, but these are your Big Champions! Learn their names and where they live in your body.
The 6 Big Muscle Champions
Upper Arm (Front)
1. Biceps
ARM
Pulls your forearm up to bend your elbow. Helps you lift groceries or carry your school backpack.
Move: Bend arm up to show your muscle!
Upper Arm (Back)
2. Triceps
ARM
Straightens your arm out straight. Works when you push open a heavy door or do push-ups.
Move: Push your hands against a wall!
Belly / Middle
3. Abs (Abdominals)
CORE
A strong wall of muscle over your stomach. Helps you bend forward, twist, and sit up in bed.
Move: Laughing makes your abs tighten!
Front of Thigh
4. Quads (Quadriceps)
LEG
Huge, powerful muscles on the front of your legs. They let you kick, run, stand up, and jump high.
Move: Stand up from your chair!
Hips / Seat
5. Glutes
HIPS
The biggest muscle in your entire body! Powers you up stairs, keeps you standing upright, and cushions when you sit.
Move: Climb a flight of stairs!
Lower Leg (Back)
6. Calves
LEG
Pulls on your heel so you can point your toes. Gives you a springy bounce when walking or running.
Move: Stand tall on your tiptoes!
Super Science Secret: Teamwork!
Muscles only pull, they never push! They work in teams: when your bicep pulls to bend your arm, your tricep relaxes.
Practice Challenge
Big Muscle Challenge
Part 2
1 "Who Am I?" Muscle Riddles
Word Bank: Biceps • Glutes • Abs • Quads
A. "I am on the front of your upper arm. You flex me to lift things!"
B. "I am the biggest muscle in your body. I help you walk and climb stairs!"
C. "I cover your belly like a strong shield. I help you sit straight up!"
2 Muscle Facts: True or False?
Read each sentence. Color or check TRUE or FALSE.
1. Your heart is a muscle that never takes a break.
TRUE FALSE
2. Muscles push bones away to move them.
TRUE FALSE
3. Your quads are big muscles on the front of your legs.
TRUE FALSE
3 Try the Moves: Feel Your Muscles!
Do each move right now at your desk. Check the box when you feel it work!
Move A: Tiptoe Stand
Stand up on your tiptoes for 5 seconds. Feel the back of your lower leg!
Felt my Calves!
Move B: Chair Squat
Stand up from your chair, then sit down slowly. Feel your thighs work!
Felt my Quads!
Move C: Desk Push
Put hands flat on desk and push down gently. Feel the back of your arms!
Felt my Triceps!
Muscle Master Badge Great job testing your body's biggest muscles!
Muscle Hunt Word Search Word Hunt
Muscle Hunt Word Search
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How to Play:
Find the 10 muscle words! Words go Across (→) or Down (↓). Circle each word as you find it.
No Backwards Words!
S P M U S C L E O H K B A N K T F R J D E L I D T R I C E P X A Q C O W Z B V N M Y R T E G Q U A D S K F T O P L O R T H E N P A C A U J C A L F S U G D T T K X B R O W L M E S E Z M O V E D L P N H S F G L O P T K V B E A C W A R M N X J Y
Word Bank Checklist (10 Words)
MUSCLE
BICEP
TRICEP
HEART
QUADS
GLUTES
CALF
MOVE
PULL
WARM
☆ Clue Hint: Remember, muscles only PULL. They never push!
2 Word Clue Match: Use Words from the Word Bank!
1. The super muscle that pumps your blood:
2. The big muscle in front of your thigh:
3. Shivering makes your body feel:
4. The muscle on the front of your arm:
Word Search Champion! 10 words found and verified!
Mighty Muscles Slides 5th Grade Science
Body Science Lab
Mighty Muscles!
Why are muscles important, and how do they move your body every day?
Over 600 muscles are working in your body right now! Let's Explore →
4 Big Jobs Muscles Do
Core Concepts
1. They Move You
Muscles pull on your bones so you can run, walk, dance, and write.
2. They Pump Blood
Your heart is a super muscle that pumps blood 24 hours a day!
3. They Hold You Up
Back and stomach muscles keep your skeleton standing tall.
4. They Keep You Warm
When you get cold, muscles shake fast (shiver) to create heat.
Key Takeaway: Without muscles, you could not move, breathe, or stand!
Try It Now: Body Lab!
Class Movement
Test 1
The Arm Squeeze
Put your left hand on your upper right arm. Now bend your elbow tight!
Feel that hard bump? That is your BICEP contracting!
Test 2
The Heart Check
Place your flat hand over the left side of your chest. Stay quiet and still.
Feel the steady thump? Your heart muscle is squeezing blood!
Both muscles are working hard for you right at this second!
Big Muscles in Your Body
Muscle Champions
ARM FRONT
Biceps
Bends your elbow up to lift your backpack.
Move: Flex arm!
BELLY
Abs
A strong shield that helps you sit straight and bend.
Move: Sit up tall!
THIGH FRONT
Quads
Big power muscles that let you kick and jump.
Move: Stand up!
HIPS / SEAT
Glutes
The biggest muscle in your body! Powers you up stairs.
Move: Climb stairs!
Every time you run, jump, or sit, all four of these muscles help you!
Super Science Secret: Teamwork!
Muscle Rule
The Golden Rule
Muscles Only PULL. They Never Push!
Because muscles can only pull, they must work in teams of two!
1. When Arm Bends
Your Bicep pulls tight (contracts), while your Tricep relaxes.
2. When Arm Straightens
Your Tricep pulls tight (contracts), while your Bicep relaxes.
Your muscles are the ultimate teamwork champions!
Quick Check: Can You Answer?
Review
Question for the Class
"Which muscle in your body works day and night, even when you are fast asleep?"
A. Bicep
B. Heart
C. Glutes
Next Step: Open your Muscle Power Guide & Worksheet! Great job, Muscle Champions!
