4th grade-ch. 5 lesson 1 what are the skeletal and muscular systems

Ch. 5Lesson 1

What are the skeletal & muscular systems?

(cranium)

tissue Similar cells working together

Organs Tissues working together

Organ systems Groups of Organs working together

jobs of skeletal system

1.supports body

2.helps you move

YouTube video-Bill Nye Bones song

3. stores calcium & other minerals

4. protects internal organs• Skull protects brain

• Ribs protect heart & lungs

5. makes blood cells

joint

• Holds your bones together

• Allows them to move

2 typesof joints

Ball & socket hinge

•shoulder•hip

knee

ball & socket joint

– Allows the most movement

hinge joint• Allows forward or backward

motion

hinge joint

pivot joint

immovable joint

ball & socket joint

4

Name that joint.Name that joint.• Determine which type of movable joint or

joints is involved in performing each activity. Give a reason to support your classifications.

1. Move your arm in a circle.2. Push open a door.3. Lift a book from a desk.4. Kneel down.5. Wave your hand.6. Twist your head from side to side.

Put your name on your LEFT FOOT.

muscular system

• Muscles that move your body – attached to skeleton-

involuntary muscles voluntary muscles

can not control can control

Breathing

Digesting food

Smiling

Walking

muscles

3 types

of muscle tissue

skeletal smooth cardiac

• attached to bones • look like have stripes

• involuntary• found in internal organs

• found in heart• involuntary• looks striped

Skeletal muscle cells appear banded, or striated.

Unlike skeletal muscles, smooth muscle cells are not striated.

Cardiac muscle cells are striated.

skeletal muscles must work in pairs

• muscle cells can only contract- not extend

• while 1 muscle contracts other muscle returns to original length

As the biceps contract, the triceps on the back of the upper arm return

to its original length.

Skeleton Crafts: Toilet Paper Roll Skeleton 

• What You'll Need:

•Approximately 68 toilet paper rolls for each one - we did 24 ribs (12 pairs) and 26 vertebrae (24 plus the sacrum and the coccyx) (ask parents at the beginning of the year to save up things like toilet paper rolls and other recyclables and donate them to the class)

• 4 paper towel rolls

• White construction paper to make the skull

• Scissors

• A black marker to draw the face

• Glue

• Brown butcher paper, or whatever long, heavy paper you have

• A book that shows an illustration of a skeleton that the student can use as a model, or an actual skeleton model

• What You Do:•

• Draw a skull outline on a sheet of white construction paper.

• Draw a face inside the skull shape.

• Cut out the skull shape.

• Draw lines for fingers on 10 toilet rolls and lines for toes on 10 more toilet rolls.

• Choose about 7 toilet rolls and cut each of them into about 4 pieces (rings) for vertebrae.

• Cut a length of butcher paper, about 8-10 feet long.

• Place your pieces on the butcher paper, starting at the top, and gluing the parts as you go.

• Hang the skeleton on the wall!