Summary
summary muscular system (basics)
- Course
- Institution
summary of the anatomy of muscles
[Show more]
Seller
Follow
NDstudent
Content preview
MUSCULAR SYSTEMAnatomy muscle
Connective tissue layers (support)
o Epimysium: wrapped around muscle
o Perimysium; wrapped around fascicles in muscle
o Endomysium: wrapped around muscle cells (myocytes in fascicles)
tendon
Anatomy muscle fiber (myocytes)
Plasmalemma / sacrolemma
- Fuses with the tendon (= fibrous cords of connective tissue)
- Surrounds individual muscle fiber = “celmembrane”
Sarcoplasm (cytoplasm)
- Gelatin-like substance
- Fills the spaces within and between myofibrils
- Fluid part of muscle fiber = “cytoplasm”
Transvers tubules (T-tubules)
- Extensions of the plasmalemma
- Are interconnected, pass through muscle fiber
- Receives nerve impulses and transmit them to the individual myofibrills
- Provide pathways from outside fiber to its interior substances can enter
fiber and waste products can leave the fibers
, Sarcoplasmic reticulum
- Network of tubules, within muscle fiber
- Storage side for calcium, essential for muscle contraction
Myofibrils
- Small fibers made up of sacromeres, thick and thin filaments
Sacromeres
- Basic functional unit myofibril and basic contractile unit
- Striped pattern of skeletal muscles
- Dark regions, known as A-bands
Lighter center, H-zone or H-band only visible when myofibrill is
relaxed
Dark line in middle of H-zone, M-line
- Light regions known as I-bands
Interrupted by dark stripe, Z-disk or Z-line (boundaries between
sarcomeres)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NDstudent. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.37. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now