Cornell Notes: Skeletal and Muscular Systems
What are 5
functions of
bones?
What are the
four types of
joints in your
body?
Skeletal System = all 206 bones (more in infants) and connective tissue joining them
5 jobs of your skeletal system:
1. provide shape and support
2. lets you move
3. protects
your organs (especially ribs and skull
4. makes blood cells
What are the 3
types of
connective
tissue and what
does each one
do?
for your body
)
(in the bone marrow)
5. stores minerals and other materials until your body needs them
Spine (backbone) is made of 26 vertebrae instead of 1 long bone
Four Types of Joints in the skeleton:
Hinge joint: allows forward and backward motion (knee and elbow
)
Ball and Socket joint: allows movement in circles (shoulder and hip
)
Pivot joint: one bone rotates around another (neck )
Gliding joint: one bone slides over the other, limited side to side motion (wrist)
Connective Tissue:
1. Ligaments connect bones to bones (ACL, MCL)
2. Cartilage covers the ends of bones and protects them from rubbing on each other
3. Tendons: connect bone to muscle
Three Important Facts from the Video Clip that I didn’t already know:
1.
2.
3.
Summary
Muscular System: There are about 650 muscles in your body
Two general types of muscles (based on control)
What is the
difference between
voluntary and
involuntary
muscles?
Involuntary Muscles: you don’t consciously control them.
What are the 3
types of muscles
and where is each
type found?
Three types of muscle tissue (some are voluntary, some are involuntary)
Examples: muscles that help you blink, breathe and digest food.
Voluntary Muscles: under your conscious control.
Examples: smiling, running, etc.
1. Skeletal muscles are
attached to the bones of
your skeleton and provide
How do skeletal
muscles work in
pairs?
the force that moves your
bones. These are
voluntary muscles.
2. Smooth muscle is found
inside your internal organs
and control movements
such as food digestion.
They are involuntary.
3. Cardiac muscle is found
only in your heart. The
contracting of these muscles is your heartbeat. Cardiac muscle is
involuntary.
Muscle cells “work” when they get messages from the nervous system to contract.
Skeletal muscles have to work in pairs. When one muscle contracts
shorter), the other relaxes
(gets longer).
Examples: biceps and triceps
, hamstring
and quadriceps.
Two Important Facts from the Video Clip that I didn’t already know:
1.
2.
Summary
(gets