read/ work on assignments quietly. write the obj, hw, and w/u on page 99. warm-up: answer in...
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MUSCULAR SYSTEM
Read/ Work on Assignments
Quietly
SKELETAL SYSTEM REVIEW Write the OBJ, HW, and W/U on page 99. Warm-up: Answer in notebook.
1. What are the 4 major functions of the skeletal system?
2. What are the 4 major joint types? Give an example of each.
3. What does bone marrow produce for the body?
DISTINGUISH BETWEENVOLUNTARY/ INVOLUNTARY MUSCLES
Voluntary Muscles Muscles that you are able to control. You choose to move them
Involuntary Muscles Muscles that you cannot control They work on their own
3 TYPES OF MUSCLES
Skeletal Muscles Move bones Most common type Tendons: thick bands of tissues
attached to bones Ligaments: thick bands of tissues
connecting muscles to muscles Voluntary Contract quickly and tire more
easily Look striped or striated
3 TYPES OF MUSCLES
Cardiac Muscle
Found only in the heart Striated Involuntary
3 TYPES OF MUSCLESSmooth Muscle Found in the internal organs Ex. Intestines Involuntary Contract and relax steady
HOW DO MUSCLES WORK? When one muscle of a pair contract, the
other relaxes Muscles always pull Over time, muscles can become larger
or smaller, depending on their usage Blood carries, energy-rich molecules to
the muscles so they can do their work.
MUSCLE FATIGUE – PAGE 100 Complete the Muscle Fatigue Lab. For the Clothespin Squeeze Trial 1: keep
squeezing the clothespin until you can’t anymore and write down how many times you squeezed it.
Same for the fist squeeze and book lift. Continue on to Trial 2 and Trial 3 for all 3
activities. Then answer the 3 questions on the
bottom of the page.
SKELETAL AND MUSCULAR SYSTEM VIDEO – 17 MIN http://app.discoveryeducation.com/
player/view/assetGuid/FCCDC511-523A-4632-8CBD-683B37AB6C66
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