1 / 11

Muscular System

Explore the main functions of the muscular system - movement, posture maintenance, joint stabilization, heat generation, and more. Learn about skeletal muscle characteristics, terminology, and connective tissue wrappings.

rhondanegron
Download Presentation

Muscular System

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. Muscular System X

  2. The Muscular System • Main function of a muscle: Contraction (shortening) Because muscles can contract: The main functions of the muscular system are: Movement Maintains Posture Stabilizes Joints Generates Heat Controls Openings (sphincters) Expressions Protection (reflexes)

  3. Comparison of Skeletal, Cardiac, and Smooth Muscles Table 6.1 (1 of 2)

  4. Characteristics of Muscles • Skeletal and smooth muscle cells are elongated ***(a muscle cell is also referred to as a muscle fiber) Some skeletal muscle cells can be up to a foot long in length • All muscles share some terminology If you see myo- mys- or sarc- you think MUSCLE! • Prefixes myo and mys refer to “muscle” • Prefix sarco refers to “flesh”

  5. Comparison of Skeletal, Cardiac, and Smooth Muscles Table 6.1 (2 of 2)

  6. Terminology Review • Endo- Inside, Within (endoskeleton) • Peri- Around, surround (perimeter) • Epi- On, over, above (epidermis)

  7. Our Focus: SKELETAL MUSCLE (Striated)

  8. Skeletal Muscle Characteristics • Attached to the skeleton • Attached by tendons to bones (or aponeuroses) • Cells are multinucleate (many nuclei) • Striated (have visible banding) • Strong force • Tires easily (muscle fatigue) • Voluntary—you control them (exception = reflexes

  9. Connective Tissue Wrappings of Skeletal Muscle • Cells are surrounded and bundled by connective tissue • Endomysium—encloses a single muscle fiber • Perimysium—wraps around a group of muscle fibers forming a fascicle (bundle of muscle fibers) • Epimysium—covers the entire skeletal muscle (many fascicles)

  10. Connective Tissue Wrappings of Skeletal Muscle Figure 6.1

  11. Let’s build a model of a muscle.

More Related