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6/9 & 6/10 - 7th Grade Agenda
Learning Objective: Drug Abuse
Prevention
Drug Abuse Prevention Lesson
Video: Walking with Prehistoric
Beasts
Reflection
• Prompt: Write 2 things that you enjoyed
about this class and 2 things that should
be improved about this class.
What is the function of the
skeletal system?
• Provide shape and
support
• Enables the body to
move
• Protects the internal
organs
• Produces blood cells
• Stores certain material
until the body needs them
Hinge Joint
• Knee and Elbow are
hinge joint
• Hinge joint allows you
to bend and
straighten your leg
Ball and Socket Joint
• Your shoulder
contains ball and
socket joint.
• Allows great range of
motion
Pivot Joint
• Pivot joint allows one
bone to rotate
• Your neck is made of
a pivot joint.
Sliding Joint
• Sliding joint allows
one bone to slide over
another
• Wrist or ankle are
examples of sliding
joint
What are Ligaments?
• Bones are held
together by strong
connective tissues
called ligaments
What is a cartilage?
• Cartilage covers the
ends of the bones
and keep them from
rubbing against each
other
Structure of Bone
What is bone marrow
• Red bone marrow
produces most of
the body’s blood
cells
• Yellow bone
marry stores fat
that can serve as
energy reserve
Osteoporosis
• As people become older,
their bones begin to lose
some of the minerals they
contain.
• Mineral loss can lead to
osteoporosis a condition
in which the body’s bones
become weak and break
easily
Different Types of Muscles
• skeletal muscle: are
attached to the bones of
your skeleton.
• smooth muscle are
involuntary muscles
used to aid digestion
• cardiac muscle: cardiac
muscle does not get
tired. It can contract
repeatedly.
How Muscles Work
What are levers
• Levers allow you to move heavy objects
with little effort
Our body is full of levers