1 / 26

Understanding the Structures of the Muscular System: Components and Functions

The muscular system is crucial to our body, comprising nearly half of our weight with over 650 muscles. These muscles are categorized into types: skeletal, smooth, cardiac, and sphincter muscles. Each muscle consists of fibers made up of myofibrils, which contain myosin and actin filaments arranged in sarcomeres, essential for muscle contraction. This system also includes connective tissues like tendons and fascia, which support and stabilize muscle function. Discover the essential structures and classifications of the muscular system for a deeper understanding of human anatomy.

lihua
Télécharger la présentation

Understanding the Structures of the Muscular System: Components and Functions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1.04 Remember the structures of the muscular system

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

  3. 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

  4. The Muscular System:Muscle Fibers • Bundles of threadlike structures called myofibrils • Composed of: • Myosin • Actin • Form overlapping pattern called sarcomere • https://www.youtube.com/watch?v=PaNFWYO1lb4 1.04 Remember the structures of the muscular system

  5. Muscles are made up of muscle fibers which are made up of myofibrils which are broken into segments called sarcomeres which have thin actin filaments and thick myosin filaments that slide across each other to produce the shortening of muscle contractions. 1.04 Remember the structures of the muscular system

  6. Structures of the muscular system Connectivetissue • Tendons • Fascia Muscles • Skeletal • Smooth • Cardiac • (Sphincter) 1.04 Remember the structures of the muscular system

  7. Structures of the muscular system Types of muscle • Skeletal • Smooth • Cardiac • (Sphincter) 1.04 Remember the structures of the muscular system

  8. Structures of the muscular system Types of Muscle Skeletal muscles • Attached to bone • Striated (striped) appearance • Voluntary 1.04 Remember the structures of the muscular system

  9. Structures of the muscular system Types of Muscle Smooth muscles • Also known as visceral muscles • Involuntary • Located in walls of digestive system organs, uterus & blood vessels 1.04 Remember the structures of the muscular system

  10. Structures of the muscular system Types of Muscle Cardiac muscle • Found only in the heart • Striated • Involuntary • Cells are fused- when one contracts, they all contract, creating the heartbeat 1.04 Remember the structures of the muscular system

  11. 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

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

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

  14. 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

  15. 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

  16. How do skeletal muscles get their names? • Location • frontalis = forehead • Size • Gluteus maximus = largest in buttock • Direction • External abd oblique = oblique means slanted • Number of origins • Biceps = two headed muscle • Location of origin and insertion • Sternocleidomastoid = originates in sternum • Action flexor • Flexor carpi ulnaris = flexes wrist • Extensor • Extensor carpi ulnaris = extends wrist • However, not all muscles are named by the above methods! 1.04 Remember the structures of the muscular system

  17. Major Skeletal Muscles

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

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

  20. Torso/Trunk (anterior)

  21. Torso/Trunk (posterior)

  22. Upper extremities

  23. Lower extremities

  24. The muscular system review Anterior view

  25. The muscular system review Posterior view

  26. 1.04 Remember the structures of the muscular systemEssential Question • What are the structures of the muscular system? 1.04 Remember the structures of the muscular system

More Related