Congress Middle School
Pre-Medical Magnet Program
2008
Presented by: Diana Herec, Medical Magnet Coordinator
Human Anatomy & Physiology
The Muscular System
Responsible for bodily movement
Includes the voluntary muscles of the body
About 700 muscles in the human body
Vary greatly in size
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
Muscle Contraction
If the force of a muscle contraction is greater than the force resisting it, the contraction is known as
Isotonic Contraction
muscle contraction continued…
If resistance to contraction is equal to the force, the muscle will not contract, known as:
Isometric Contraction
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
Skeletal Muscle continued…
Skeletal muscle is under constant control, therefore, known as:
Voluntary Muscle
Just below the surface of the skin
The muscles and skeleton
are responsible foran individual’s
Physique
Muscle Types
Classified by shape:
Parallel fibers Oblique fibers
Shape and arrangement of fibers reflect muscle function
Pennate Muscles
Have feather-like appearance and fibers run obliquely down to the tendon
Some spiral muscles have the capacity to turn half a rotation between their attachments
Others twist around a bone
In the common spindle-shaped muscles, all fibers run from one tendon to another
Circular Muscles
Fibers of circular muscles are arranged in concentric circles
Muscles consist of bundles of fibers that can be organized in different ways, according to the function of the muscle
Muscles You Will Need To Know
1. Temporalis2. Masseter4. Sternocleidomastoid5. Pectoralis Major6. Serratus Anterior7. External Obliques24. Rectus Abdominus27. Biceps28. Deltoid29. Trapezius32. Frontalis
Name 1,2, 4, 5, 6, 7, 24, 27, 28, 29, 32
1. Temporalis2. Masseter4. Sternocleidomastoid5. Pectoralis Major6. Serratus Anterior7. External Obliques24. Rectus Abdominus27. Biceps28. Deltoid29. Trapezius32. Frontalis
You Will Need to Know
14. Adductor Magnus
15. Sartorius
17. Soleus
18. Gastrocnemius
20.Tibialis Anterior
21. Quadriceps
Name #14, 15, 17, 18, 20, 21
14. Adductor Magnus
15. Sartorius
17. Soleus
18. Gastrocnemius
20.Tibialis Anterior
21. Quadriceps
You Will Need to Know
2. Trapezius3. Deltoid4. Latissimus Dorsi7. Gluteus Maximus9. Gastronemius11. Soleus15-17 Hamstrings22. Tricep
Name #2, 3, 4, 7, 9, 11, 15-17, 22
2. Trapezius3. Deltoid4. Latissimus Dorsi7. Gluteus Maximus9. Gastronemius11. Soleus15-17 Hamstrings22. Tricep
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