1 / 12

Exercise 10

Exercise 10. Muscle histology. Muscle Types. Skeletal – attached to bone by tendons is responsible for voluntary movements. Cardiac- located in heart Smooth - located in the walls of internal organs, blood vessels, and airways. Skeletal muscle fibers. Connective tissue layers:

emmly
Télécharger la présentation

Exercise 10

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. Exercise 10 Muscle histology

  2. Muscle Types • Skeletal – attached to bone by tendons is responsible for voluntary movements. • Cardiac- located in heart • Smooth- located in the walls of internal organs, blood vessels, and airways

  3. Skeletal muscle fibers • Connective tissue layers: • Epimysium- around the entire muscle • Perimysium surrounds bundle of muscle fibers (fascicle) • Endomysium-surrounds each muscle fiber

  4. Skeletal muscle cont. • Striations in appear because of alternating light and dark bands from the arrangement of the thick and thin protein filaments called myofibrils.

  5. Skeletal muscle

  6. Cardiac muscle • Forms branching networks. • Striated • Linked together by intercalated discs

  7. Smooth Muscle • Widest in middle and tapered toward each end. • Single nucleus

  8. Cell structure of skeletal muscle • Actin- main component of thin filaments. • Myosin- main component of thick filaments • Together these are called myofilamentswhich are packaged into parallel bundles called myofibrils.

  9. Structure of a skeletal muscle fiber

  10. Structure of a skeletal muscle fiber • Sarcolemma or cell membrane • T-tubules-continuous with the sarcolemma and travel into the cytoplasm • Sarcoplasmicreticulum-SER • Cisternae- saclike extensions of the SR

  11. Neuromuscular Junctions • Synaptic terminal- the expanded knob at the end of the nerve fiber • Motor end plate-the region of the sarcolemma associated with the neuromuscular junctions. • Synaptic cleft- narrow space between the cell membrane

  12. The End • View the different types of muscle under the microscope. • Be able to ID the various terms on models, pictures or on slides

More Related