1. The Muscular System Tour

2. The Muscular System Muscles are Needed for all types of movement
Needed to pump blood
Needed to breathe (diaphragm muscle)
Needed to produce body heat and regulate body temperature
Needed to protect internal organs

3. Three Types of Muscle Muscle Tutorial Video Clip (Open in New Window)
Skeletal: Voluntary (under your conscious control), movement of your bones, face, eyes,etc.
Cardiac Muscle: Involuntary (not under your conscious control), movement of your heart and certain blood vessels
Smooth: Involuntary (not under your conscious control), movement of your intestines, stomach and other internal organs
                                   

4. Skeletal Muscle 400 X striations nuclei
Move your bones(also your face,eyes, etc.)
Voluntary (you can control them)
Over 400 skeletal muscles in your body
Long cells with several nuclei (along edges of cell)
Stripes called striations (visible under high power)

5. Cardiac Muscle 400 X nuclei The muscle of the heart
                                   
The muscle of the heart
Involuntary (you cannot control them)
Works 24 hours a day your entire life
Strongest type of muscle
Only one nucleus per cell (usually in center of cell)
Some striping (some striations) but not as much as skeletal
muscle

6. Smooth Muscle
400X
nuclei
The muscles of the esophagus, stomach, intestines and other internal organs
Involuntary (you cannot control them)
Contract slowly and smoothly
Can remain contracted for long periods of time
Usually one nucleus per cell (Usually in the center of the cell)
No striping (striations)

7. Anatomy of a Muscle
Animation
Open in New Window

15. Interactive Muscle Review
Maricopa Muscle Tutorial
Interactive Muscle Review

16. Label & Color the Muscles of the
Head
Anterior Body
Posterior Body
Thigh/Leg
Posterior Shoulder
Anterior Shoulder
Maricopa Muscle Tutorial

17. Maricopa Muscle Tutorial
Label and color these muscles of the head: (you can draw arrows)
Sternocleidomastoid Obicularis Oculi
Obicularis Oris
Zygomaticus
Masseter
Trapezius
Frontalis

18. Maricopa Muscle Tutorial
Label and color these muscles of the Anterior body:
Pectoralis major
Serratus anterior
Deltoid
Rectus Abdominus
External oblique
Biceps brachii
Brachialis
Triceps brachii
Latissimus dorsi

19. Maricopa Muscle Tutorial
Label and color these muscles of the Posterior body: (you can draw arrows)
Deltoid
Trapezius
Latissimus dorsi
Gluteus medius
Gluteus maximus Infraspinatus
Teres major
Triceps brachii

20. Label and color these muscles of the Thigh/Leg: (you can draw arrows)
Vastus medialis
Vastus lateralis
Satorius
Adductor longus
Adductor mangus
Gracilis
Rectus femoris
Gastrocnemius
Soleus
Tibialis anterior
Maricopa Muscle Tutorial

21. Maricopa Muscle Tutorial
Posterior Shoulder
Label/color:
Deltoid
Infraspinatus Supraspinatus Teres minor
Teres major

22. Maricopa Muscle Tutorial
Anterior Shoulder Label/color: Subscapularis Coracobrachialis Supraspinatus

23. The Sliding-Filament Theory of Muscle Action
The "Sliding-Filament Theory of Muscle Action" explains how the movement of thick- and thin-filaments relative to each other leads to the contraction and relaxation of whole muscles - hence ultimately to the movement of the limbs or tissues attached to those muscles:
There are two physical units that are important for the action of muscles. They are thick filaments (Protein myosin) and thin filaments. (Protien actin).
Muscle tissue can be described in terms of units called sacromeres. These units are defined in terms of groups of overlapping filaments (the thin and thick filaments previously described). Sacromeres are arrangements of thick and thin filaments.

24. The length of a sacromere and the zones (H zone, I band and A band) within each sacromere, are determined by the positions of the thick and thin filaments relative to each other. This is illustrated in the three diagrams to the left showing the relative length and configuration of two sacromeres of relaxed muscle (top), partially contracted muscle (centre) and lengthened muscle (bottom diagram).

25. The sliding filament theory is the basic summary of the process of skeletal muscle contraction. Myosin moves along the filament by repeating a binding and releasing sequence that causes the thick filament to move over the thinner filament. This progresses in sequential stages. By progressing through this sequence the filaments slide and the skeletal muscles contract and release.

26. Muscular System