1. Congress Middle School
Pre-Medical Magnet Program
2008
Presented by: Diana Herec, Medical Magnet Coordinator

2. Human Anatomy & Physiology
The Muscular System

3. Responsible for bodily movement
Includes the voluntary muscles of the body
About 700 muscles in the human body
Vary greatly in size

4. Muscle Action
Muscle action depends on its position with the joint it works on
Limb movement requires the teamwork of several muscles
Muscles contract when activated

5. Muscle Contraction
If the force of a muscle contraction is greater than the force resisting it, the contraction is known as
Isotonic Contraction

6. muscle contraction continued…
If resistance to contraction is equal to the force, the muscle will not contract, known as:
Isometric Contraction

7. Skeletal Muscle Most prominent type of muscle in the body
May account for up to 60% body mass
It is attached to bones at both ends by tendons

8. Skeletal Muscle continued…
Skeletal muscle is under constant control, therefore, known as:
Voluntary Muscle

9. Just below the surface of the skin
The muscles and skeleton
are responsible for
an individual’s
Physique

10. Muscle Types Classified by shape:
Parallel fibers
Oblique fibers
Shape and arrangement of fibers reflect muscle function

11. Pennate Muscles
Have feather-like appearance and fibers run obliquely down to the tendon

12. Some spiral muscles have the capacity to turn half a rotation between their attachments

13. Others twist around a bone

14. In the common spindle-shaped muscles, all fibers run from one tendon to another

15. Circular Muscles
Fibers of circular muscles are arranged in concentric circles

16. Muscles consist of bundles of fibers that can be organized in different ways, according to the function of the muscle

17. Muscles You Will Need To Know
1. Temporalis
2. Masseter
4. Sternocleidomastoid
5. Pectoralis Major
6. Serratus Anterior
7. External Obliques
24. Rectus Abdominus
27. Biceps
28. Deltoid
29. Trapezius
32. Frontalis

18. Name 1,2, 4, 5, 6, 7, 24, 27, 28, 29, 32 1. Temporalis 2. Masseter
4. Sternocleidomastoid
5. Pectoralis Major
6. Serratus Anterior
7. External Obliques
24. Rectus Abdominus
27. Biceps
28. Deltoid
29. Trapezius
32. Frontalis

19. You Will Need to Know 14. Adductor Magnus 15. Sartorius 17. Soleus
18. Gastrocnemius
20.Tibialis Anterior
21. Quadriceps

20. Name #14, 15, 17, 18, 20, 21 14. Adductor Magnus 15. Sartorius
17. Soleus
18. Gastrocnemius
20.Tibialis Anterior
21. Quadriceps

21. You Will Need to Know 2. Trapezius 3. Deltoid 4. Latissimus Dorsi
7. Gluteus Maximus
9. Gastronemius
11. Soleus
15-17 Hamstrings
22. Tricep

22. Name #2, 3, 4, 7, 9, 11, 15-17, 22 2. Trapezius 3. Deltoid
4. Latissimus Dorsi
7. Gluteus Maximus
9. Gastronemius
11. Soleus
15-17 Hamstrings
22. Tricep