Do Now: Pick up the skeleton worksheet
and match up the name of the bone with
the bone. Do your best 
THE SKELETAL SYSTEM
Understandings:
Why do we have a skeletal system?
What makes up our skeletal system?
Objective:
 Label the parts of the skeletal system
 Explain how the skeletal system functions
 Identify problems with the skeletal system
 Recall how to care for your skeletal system
Skeletal System
 Body System: a group of organs that work together to
perform an important function
 Skeletal System: a frame work of bones that supports
you, allows you to move, protects vital organs and
produces blood cells
 Functions:




Supports you
Allows you to move
Protects vital organs
Produces blood cells
The Skeletal System
 Made up of 206 bones.
 The bones of the face, skull, vertebral column
and rib cage make up your body’s central
framework for support. (Protects vital
organs!)
Important “Bone” Terms
 Cartilage: a strong
flexible tissue on the
ends of some bones
 It provides a cushion
where bones come
together.
 Ligaments: strong
cords of tissue that
connect bones to
bones in your joints.
Support and Movement
 Which bones provide support and
movement?
 Bones of the:
 Arms
 Legs
 Pelvis
 They work with muscles to help us move!
Anatomy of a Bone
The Inside of a Long Bone
Parts of a Long Bone
 Periosteum – covering on
bones
 Compact Bone – hard bone
 Spongy Bone – soft bone
 Bone Marrow – blood cells
made here
 Parts of the Bone
Movie: The Skeletal System
How do our bones move?
 Joint: a point at which two bones meet.
 Without joints, you could not move.
 Three main kinds of joints:
 Hinge Joint
 Ball and Socket Joint
 Fixed Joint
Muscle and Bones Make Joints Move
Joints
Types of Joints
Movements
Locations
Hinge Joint
Provides back and forth
movement.
Elbow, Knees
Fixed Joint
No movement is allowed.
Plates of the skull
Ball-and-Socket Joint
Allows a wide range of
movements.
Shoulder, Hip
The Skeletal System
•Skull
•Clavicle
•Scapula
•Humerus
•Sternum
•Rib Cage
•Vertebrae
•Ulna
•Radius
•Femur
•Patella
•Fibula
•Tibia
The X-Ray GIFs of
Cameron Drake
Moving X-rays
Brain Pop Videos
Joints
Broken Bones
Problems and Caring for the
Skeletal System
Skeletal System Problems
Osteoporosis
Osteoporosis Fact!
 A disease in which bones
 About 85-90% of adult
become thin and brittle.
 Who does this affect?
bone mass is acquired by
age 18 in girls and 20 in
boys. Building strong
bones during childhood
and adolescence can help
to prevent osteoporosis
later in life.
 (from
http://www.nof.org/osteop
orosis/diseasefacts.htm)
 55% of people who are over
the age of 55.
 Of the 10 million Americans
who have this disease, 8
million are women and 2
million are men.
 (from
http://www.nof.org/osteopor
osis/diseasefacts.htm)
Skeletal System Problems
Scoliosis
 Causes: deformity of the
spine win which the spine
develops an S-shaped
curve when viewed from
behind.
 Can this affect you?
Affects 2% of women and
.5% of men in the general
population
Photograph of someone with
scoliosis.
Skeletal System Problems
Sprain
 Stretching or partial
tearing of ligaments.
 Can be painful and cause
swelling around the injured
joint.
 http://yucky.discovery.com
/flash/body/yuckystuff/ankl
esprain/js.index.html
What happens when you sprain
your ankle?
Caring for your Skeletal
System
 Exercise regularly using weights, walking,




running, jumping rope, dancing, hiking,
soccer, or basketball (just to name a few
activities!).
Wear proper fitting shoes.
Select foods and beverages rich in calcium,
phosphorus, and vitamin D.
Sit, stand, and walk with correct posture.
Participate in screenings for scoliosis.
Skeleton Game
Labeling the Skeleton