1. 1.04 Remember the structures of the muscular system

2. Muscular System Introduction Activity
1) You and a partner will complete the following…
2) Using a green textbook turn to the following pages, pg &
2) On one sheet of paper, you and a partner will identify 6 different muscles in the human body (2) Axial & (4) Appendicular Skeleton
3) Beside the muscle write its action/movement & nerve innovator.
4) Each group will present their findings at the end of 20 minutes
1.04 Remember the structures of the muscular system

3. 1.04 Remember the structures of the muscular system

4. 1.04 Remember the structures of the muscular system
Essential Question
What are the structures of the muscular system?
1.04 Remember the structures of the muscular system

5. 1.04 Remember the structures of the muscular system
Comprises nearly half our weight.
Over 650 muscles.
Each muscle is made up of hundreds or thousands of muscle fibers.
1.04 Remember the structures of the muscular system

6. The Muscular System: Muscle Fibers
Bundles of threadlike structures called myofibrils
Composed of:
Myosin
Actin
Form overlapping pattern called sarcomere
muscle muscle fiber
sarcolemma sarcomere
functional unit of muscle movement
1.04 Remember the structures of the muscular system

7. 1.04 Remember the structures of the muscular system

8. Structures of the muscular system
Muscles
Skeletal
Smooth
Cardiac
Sphincter
Connective tissue
Tendons
Fascia
1.04 Remember the structures of the muscular system

9. Structures of the muscular system
Types of muscle
Skeletal
Smooth
Cardiac
Sphincter
1.04 Remember the structures of the muscular system

10. Structures of the muscular system
Types of Muscle
Skeletal muscles
Attached to bone
Striated (striped) appearance
Voluntary
Cells are long, cylindrical & multinucleated muscle cell bundles
1.04 Remember the structures of the muscular system

11. Structures of the muscular system
Types of Muscle
Smooth muscles
Also known as visceral muscles
Non-striated & Involuntary
Located in walls of digestive system, uterus & blood vessels
Cells are short, spindle-shaped & have a single nucleus
Extremely extensible, while retaining ability to contract
1.04 Remember the structures of the muscular system

12. Structures of the muscular system
Types of Muscle
Cardiac muscle
Found only in the myocardium of the heart
Striated, branched
Involuntary (Unconsciously controlled)
Cells are fused- when one contracts, they all contract, creating the heartbeat; short, branching & have a single nucleus
1.04 Remember the structures of the muscular system

13. Structures of the muscular system
Types of Muscle
Sphincter muscles
Also called dilator muscles
Special, circular muscles
Located in the
digestive system
urinary system
1.04 Remember the structures of the muscular system

14. Structures of the muscular system
Types of Muscle
Skeletal
Smooth
Cardiac
Sphincter
1.04 Remember the structures of the muscular system

15. Structures of the muscular system
Types of Connective tissue
Tendons
Fascia
1.04 Remember the structures of the muscular system

16. Structures of the muscular system
Connective tissue
Tendons
dense bands that connect skeletal muscle to the bone
1.04 Remember the structures of the muscular system

17. Structures of the muscular system
Connective tissue
Fascia
Fibrous connective tissue sheets that wrap around muscle bundles
1.04 Remember the structures of the muscular system

18. How do skeletal muscles get their names?
Location of origin and insertion
Location
Size
Action flexor
Direction
Extensor
Number of origins
Depressor
However,
not all muscles are named by the above methods!
1.04 Remember the structures of the muscular system

19. There are four characteristics associated with muscle tissue:
Excitability – Tissue can receive & respond to stimulation
Contractility – Tissue can shorten & thicken
Extensibility – Tissue can lengthen
Elasticity – After contracting or lengthening, tissue always wants to return to its resting state
1.04 Remember the structures of the muscular system

20. 1.04 Remember the structures of the muscular system
The characteristics of muscle tissue enable it to perform some important functions, including:
Movement – both voluntary & involuntary
Maintaining posture
Supporting soft tissues within body cavities
Guarding entrances & exits of the body
Maintaining body temperature
1.04 Remember the structures of the muscular system

21. Anatomy of skeletal muscles
Epimysium
Perimysium
Tendon
Muscle Fascicle
Surrounded by perimysium
Endomysium
Skeletal muscle
Surrounded by
epimysium
Skeletal muscle fiber (cell) (cell)
Surrounded by endomysium

22. 1.04 Remember the structures of the muscular system
Head & Neck Muscles
1.04 Remember the structures of the muscular system

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24. Torso/Trunk (anterior)
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25. Torso/Trunk (anterior)
1.04 Remember the structures of the muscular system

26. Torso/Trunk (posterior)
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Upper extremities
1.04 Remember the structures of the muscular system

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Lower extremities
1.04 Remember the structures of the muscular system

29. The muscular system review Anterior view
1.04 Remember the structures of the muscular system

30. The muscular system review Posterior view
1.04 Remember the structures of the muscular system

31. 1.04 Remember the structures of the muscular system Essential Question
What are the structures of the muscular system?
1.04 Remember the structures of the muscular system

32. 1.04 Remember the structures of the muscular system
FINISH COLORING IN MUSCLES PACKETS!!!!!!!
1.04 Remember the structures of the muscular system