1 / 13

Skeletal Muscle Structure

Skeletal Muscle Structure. Basic Structure. This stuff is easy!. Each skeletal muscle is an organ composed mainly of skeletal muscle cells and connective tissue Tendons – connect Muscle to Bone Most skeletal muscles extend from one bone across a joint to another bone Muscles PULL!.

melora
Download Presentation

Skeletal Muscle Structure

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. Skeletal Muscle Structure

  2. Basic Structure This stuff is easy!

  3. Each skeletal muscle is an organ composed mainly of skeletal muscle cells and connective tissue • Tendons – connect Muscle to Bone • Most skeletal muscles extend from one boneacross a jointto another bone • MusclesPULL!

  4. Skeletal Muscle is composed of 3 parts • Origin • Attachment to the bone thatREMAINS STATIONARY or fixedwhen movement occurs • Insertion • Point of attachment to the bonethat moves when a muscle contracts • Body • Main part of the muscle / bulk

  5. Tendons • Connect Muscle to Bone • STRAIN when injured • NOT to be confused with a Ligament • Connects Bone to Bone at a Joint -SPRAIN • Strong • Some Elasticity • Enclosed in synovial tubes • Lubricant • Tendon Sheaths

  6. Bursae • Small synovial-lined sacs containing synovial fluid • Located between tendons and bone at joint • Reduce Friction with movement

  7. Microscopic Structure of Muscle Fibers It really is like String Cheese

  8. Contractile cells /FIBERS grouped into bundles • Each Fiber is wrapped by theEndomysium

  9. Each Bundle isaFascicle • Each Fascicle is wrapped by thePerimysium • All bundles are wrapped by theEpimysium

  10. The WHOLE Package of muscle is encased by theFasciaan non-elastic protective tissue

  11. Fibers contain two types ofmyofilaments • Thick • Contain the proteinMYOSIN • Thin • Contain the proteinACTIN

  12. Basic functional or contractile unit is called a SARCOMERE

  13. Sarcomeres separated from each other by dark bands called Z LINES

More Related