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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 for an individuals 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. 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
Name 1,2, 4, 5, 6, 7, 24, 27, 28, 29, 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
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, Adductor Magnus 15. Sartorius 17. Soleus 18. Gastrocnemius 20.Tibialis Anterior 21. Quadriceps
You Will Need to Know 2. Trapezius 3. Deltoid 4. Latissimus Dorsi 7. Gluteus Maximus 9. Gastronemius 11. Soleus Hamstrings 22. Tricep
Name #2, 3, 4, 7, 9, 11, 15-17, Trapezius 3. Deltoid 4. Latissimus Dorsi 7. Gluteus Maximus 9. Gastronemius 11. Soleus Hamstrings 22. Tricep
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