Muscular System, Sliding Filament Theory (1)




skeletal muscles like the biceps brachii attach to bone via connective tissue called tendons muscles are composed of bundles of muscle fibers each bundle is separated by connective tissues known as Paramecium each fasciculus is made up of muscle fibers which are separated by connective tissue called endomysium skeletal muscle fibers or cells are multinucleated and striated in appearance muscle cells are composed of subunits called myofibrils each myofibril is made up of several mile Philemon's the two types of myofilaments shown in red are composed primarily of the protein myosin and a thin mile filament shown in blue composed mainly of the protein actin the repeating arrangement of thick and thin myofilaments serves as the fundamental subunit of striated muscle contraction these subunits are called sarcomeres a sarcomere contraction is represented by the shortening of the distance between the Z lines the sarcomere shortens because the thin filaments slide past the thick filaments in 3d each thick mile filament is surrounded by six thin myofilaments arranged in a hexagonal pattern the 3d arrangement of sliding myofilaments is the microscopic basis of muscle contraction

Have any Question or Comment?

38 comments on “Muscular System, Sliding Filament Theory (1)

this was so helpful thank you

Reply

Shout OUT to Mr. Moore's summer Anatomy crash course 2018. Are we having fun yet? LOL  here  is another (and amusing) video to learn Sliding Filament Theory from: https://www.youtube.com/watch?v=Ktv-CaOt6UQ

Reply

Hey guys, this is a fastpaced video. I transcribed it for study. Here is the transcript text. I didn't take the time to correct any spelling though. Here goes: Skeletal muscles like the bicep brachii attach to bone via connective tissues called tendons.
Muscles are composed of bundles of muscle fibers. Each bundle is separated by connective tissues
called paramysieum. Each vesciculas is made up of muscle fibers which are separated by connective
tissue called endomiseum. Skeletal muscles fibers and cells are multinucleated and striated in
appearance. Muscles cells are composed of sub-units called myofibrals. Each myofibral is made up of
several myofilaments. The 2 types of myofilaments shown in red are composed primarily of the protein
myocin and the thin myofilament shown in blue composed of the protein actin. The repeating arrangement
of thick and thin myofilaments serves as the fundamental subunit of striated muscle contraction.
These subunits are called sarcomeres. A sarcomere contraction is represented by the shortening of
the distance between the Zlines. The sarcomere shortens because the thin filaments slide past the
thick filaments. In 3D each thick myofilament is surrounded by 6 thin myofilaments arranged in a
hexagonal pattern. the 3D arrangement of sliding myofilaments is the microscopic basis of muscle contraction.

Reply

I really appreciate the high quality in this vid, keep up the good work (:

Reply

short and crisp……
really helpful…..
good…….

Reply

This didn't ned 3 days right?
dman school is such a waste of time i tell ya

Reply

coucou matthieu <3<3<3 je t'invite a regarder ma nouvelle photo de profil haha

Reply

Great. Now to explain it in my own words. O_O

Reply

I just keep seeing a red tube pushing out a smaller red tube

Reply

Si toi aussi t'es là grâce au cours de paces physio du prof delcaux à paris 5, pousse vert

Reply

Thank you. I still find it weird that this is still just a 'theory'. You would think that with the technology we have now, this would either be a fact or disproven.

Reply

Thanks, this really helps me out for finals!

Reply

Yo yo… Fine vid clip.

My uncle was formerly an obese fella. He went from 293 lbs of pure fat to 203lbs of complete muscle. That shit was outrageous! I just signed up personally because I would like to greatly improve my overall physique. He made use of the Muscle Building Bible (Look in Google)…

Reply

Mad ups for replying to this, but I was still in high school when I posted this. I didn't even know about acetylcholine. At the time I thought the body just sort of shat out a bunch of Ca^(-2) Ions all over the filaments.

Reply

If I hear the word ATP one more time…

Reply

I had the replay this like 10 times.

Reply

THIS GUY!!!!!!!! <————

Reply

Great animation thank you!!! But just to let you know at the beginning you said "muscles are composed of bundles of 'muscle fibers' but it's actually composed of Fascicles, if you are really saying it in order from outside to inner muscle.

Reply

If you want to gain some muscle, you should definitely Google search for "Oak Muscle Method". You are sure to get the body you want.

Reply

Actin and Myosin are wrongly labelled in this video -_-
He says blue ones are actin, when the diagram shows the blue one as myosin :S. The right answer however, is that the blue ones are actin because they are the ones connected to Z lines.

Reply

how does this explain how energy is produced in exercise?

Reply

mega spændende dude!!

Reply

Really wish this was in better video quality than 240p lol

Reply

If I had just watched this a few days ago… I would've done better on my pop quiz! Good thing it wasn't graded haha, thanks for this video.

Reply

Leave a Reply

Your email address will not be published. Required fields are marked *