Transcript Bones - Trunity

Human Systems
Unit 2
Language Learning Goal
Define:
• Joint
• Bone
• Skeleton
Content Learning Goal
• Students will learn what makes our bodies
stand up and move by learning about our
bones, joints and muscles. You will know
at least two examples of each.
Your Bones
• What keeps our
bodies from falling
over? Skeletons
• Skeletons have 206
bones!
• Bones are organs
made up of tissues
• Bones are hard on
the outside and soft
on the inside
Bones Continued
• Bones are all connected to
each other. They are joined
together by tissues called
ligaments.
• Another tissue-cartilage-is
between bones.
• Cartilage protects bones
from rubbing against each
other.
Bones Continued
• Bones are all different
shapes. Some are flat
bones that curve around
your heart and lungs to
protect them.
• Some bones are long
bones – these are on
your arms and legs to let
you move around.
Your Joints
• Look at your hand
and bend your
fingers. Each finger
has several bones.
Fingers bend
because of the parts
on the ends of each
bone…these parts
are called joints.
Joints Continued
• There are different kinds of joints. One is a
hinge joint. We have hinge joints in our
knees.
• There are also ball-and-socket joints. These
can go in any direction, like a shoulder.
• What kind of joint is a wrist? Elbow? Hip?
Ankle? Finger?
Muscles!
•
Blink. Swallow. Stand. Step. All these take
muscles. Muscles are organs that make our
bodies move in certain ways. There are:
1. skeletal muscles to MOVE
2. smooth muscles inside us
3. And the heart (organ).
•
What kind of muscles are the
stomach, hamstring and bicep?
How your Muscles Work
Skeletal muscles
• Put your elbow on the desk and move
your forearm up and down. How many
muscles do you use?
• TWO. One up and one down. Every body part you
can move has two muscles. Each muscle can only go
one direction.
• A muscle pulls a bone and contracts or gets shorter.
• It relaxes and gets longer when another muscle pulls
the bone.
Muscles Continued
Biceps and triceps
• Put your hand on the middle of your upper
arm. Bend your arm. The lump you feel is
your bicep. It contracts and pulls your
forearm up.
• Now lower your arm and feel it relax. That
means your tricep is contracting and
pulling your forearm down.
• Go over Questions #1-2 on Page 109.
Review
• Answer Questions #1-7 in the Review on Page
110.
ACTIVITY
• Go over the Skeleton
Hand-Out and then fill in
the blanks on the
worksheet.