1. M.Rich, RN, BSN https://www.youtube.com/watch?v=rMcg9YzNSEs
Muscular System
M.Rich, RN, BSN

2. Standard 8
Outline the gross and cellular anatomy and physiology of the musculoskeletal, neurological, and cardiovascular systems. Review the gross anatomy of the other systems studied in previous courses.

3. Objective
Function of Muscles
Types of Muscles
Major Skeletal Muscles

4. WHAT DO OUR MUSCLES DO? OUR MUSCLES:
• Enable us to move our body parts.
• Give us our individual shape.
• Protect and keep in place our abdominal organs.
• Enable us to maintain good posture.
• Help in the circulation of our blood.
• Generate body heat when they contract.
THERE ARE OVER 600 SKELETAL MUSCLES IN THE BODY- 150 IN THE HEAD AND NECK.

5. 3 Types of Muscle
3 TYPES OF MUSCLE 1. Skeletal: Attaches to bone & allows for movement 2. Smooth: Found in the walls of the stomach, intestines, and blood vessels. Helps materials move through these structures 3. Cardiac: Makes the heart beat to send blood to the body.

6. Cardiac Muscle Cardiac is a special type of involuntary Muscle.
It is ONLY found in the heart.
It contracts regularly, continuously and without tiring. It works automatically but is under constant nervous and chemical control.

7. Smooth Muscles or INVOLUNTARY MUSCLES
These muscles work automatically – they are not under our conscious control. e.g. Muscles of the digestive system.

8. SKELETAL or VOLUNTARY MUSCLES
They are under our conscious control.
This means we instruct them to perform everyday actions such as walking, running and jumping.

9. Major Skeletal Muscles
Deltoid
Biceps
Abdominals ( 4 muscles)
Quadriceps (4 muscles)
Pectorals
Latissimus dorsi
Trapezius
Triceps
Gluteals (3 muscles)
Hamstrings (3 muscles)
Gastrocnemius

10. Muscle Main Action Deltoid Raises your arm sideways at the shoulder
Biceps Bends your arm at the elbow
Abdominals Pull in your abdomen. Flex your trunk so you can bend forward
Quadriceps Straighten your leg at the knee and keep it straight when you stand
Pectorals Raises your arm at the shoulder. Draws it across your chest
Latissimus dorsi Pulls your arm down at the shoulder. Draws it behind your back
Trapezius Holds and rotates your shoulders. Moves your head back and sideways
Triceps Straightens your arm at the elbow
Gluteals Pull your leg back at the hip. Raise it sideways at the hip. Gluteus maximus is the biggest.
Hamstrings Bend your leg at the knee
Gastrocnemius Straightens the ankle joint so you can stand on tiptoes

11. Muscular Contraction: How Muscles Work
Muscles only PULL , not PUSH Muscles work only through contraction. Muscles work in PAIRS

12. Muscles work in pairs

13. HOW DO MUSCLES WORK TOGETHER?
Muscles can only contract. If one muscle contracts to bring two bones together another muscle is need to Contract to bring the bones apart again.
e.g. a bicep curl
So, MUSCLES ALWAYS WORK IN PAIRS
We need large numbers of pairs of muscles to work together in different ways for even simple body movements. Our muscles take on different roles depending on the movement they are performing.

15. Work our muscles – Take 5 minutes to think of an exercise to share with class.
Deltoid (Adyson and Kirsten)
Biceps and Gluteals (3 muscles) (Ashlyn and Alex)
Abdominals ( 4 muscles) (Rachel and Parker)
Quadriceps (4 muscles) (Lakyn and Emily)
Pectorals (Wiley and Mason)
Latissimus dorsi and Gastrocnemius(Ben and Hailey)
Trapezius (Carson and Kayla)
Triceps and Hamstrings (3 muscles) (Courtney and Elsayed)

16. Label Muscle Man
Color each muscle a different color