Joints and levers in the human body || 3D Animation||Education Biology

Joints and levers in the human body
Bones, ligaments, and muscles are the structures that form levers in the body to create human movement. In simple terms, a joint (where two or more bones join together) forms the axis (or fulcrum), and the muscles crossing the joint apply the force to move a weight or resistance. Levers are typically labeled as first class, second class, or third class. All three types are found in the body, but most levers in the human body are third class.
A first-class lever has the axis (fulcrum) located between the weight (resistance) and the force (figure 1.21a). An example of a first-class lever is a pair of pliers or scissors. First-class levers in the human body are rare. One example is the joint between the head and the first vertebra (the atlantooccipital joint) (figure 1.21b). The weight (resistance) is the head, the axis is the joint, and the muscular action (force) come from any of the posterior muscles attaching to the skull, such as the trapezius.
Muscles and bones act together to form levers. A lever is a rigid rod (usually a length of bone) that turns about a pivot (usually a joint). Levers can be used so that a small force can move a much bigger force. This is called mechanical advantage.
There are four parts to a lever - lever arm, pivot, effort and load. In our bodies:
bones act as lever arms
joints act as pivots
muscles provide the effort forces to move loads
load forces are often the weights of the body parts that are moved or forces needed to lift, push or pull things outside our bodies.
Levers can also be used to magnify movement, for example, when kicking a ball, small contractions of leg muscles produce a much larger movement at the end of the leg.
Levers are able to give us a strength advantage or a movement advantage but not both together.
#Joints&lever #joints #bones #jointpain #biologyclass10 #biology

[@VMAFIA]

Fantastic video! Informative and straight to the point

[@sumaitabinteshorif3260]

I can't possibly thank you enough for uploading this. My text book is pretty shitty and couldn't understand a thing by reading it and now that I've come across this video I do understand the bone lever system. THANK YOU! :)

[@shailyshah7998]

Sumaita Binte Shorif same here

[@fiduciaryxucb445]

I'm sure i will go in to school with all the knowledge i need thanks to this video! thumbs up!

[@joshlucas6347]

Lets go so great excellent revision g

[@aloshadigges1058]

Heel joint is not the fulcrum, the metatarsophalangeal joint is the fulcrum

[@justinaung3633]

Alosha Digges mr fancy words

[@markalderdice2288]

Thank you! It's amazing how many people get this wrong

[@Dan_Therapist]

ok. Photosynthesis

[@xwfitnessbycyrilwayne8181]

thx man, that really helped

[@journey-towardsALLAH-Tala]

Good explanation 👍👍👍👍

[@dr.marioma9805]

Very good video and has enough information which I needed so I want to thank you so much

[@arazahmad9084]

Thanks
now i learn the diffrent type of lever

[@avijitsarker9191]

Simple but wow 😍

[@tarukafernando9440]

thank you. great video

[@WilliamHendershott]

Thank you DK Baseball Clinics for this link. This is excellent.

[@sowmyaanil1188]

So helpfull ... thank uuu so much😍😍

[@azadwindersingh113]

Fantastic vedio

[@ramzanrajput8161]

this is very helpfull for ma during exams . thanks a lot for your kind effort

[@najifatasnia1007]

Thank you so much. Very helpful video.

[@manavwadhwa2801]

amazing way of telling

[@signin7202]

Simple and to the point

[@copperlight]

Nice and simple

[@kalibonoszkrystian5806]

omg coz of that I just got a completely point of view how my bones and muscles move.

[@kalibonoszkrystian5806]

new*

[@Vs-nl4qi]

What single joint in the body can be used as a first- class lever and a second- class lever
Please help me

[@Abdul_Basit120]

This was easy but you could have explained a bit more and slowly

[@vengadsuma8899]

Thanks for the video I have learn this from you. Special thanks

[@jenniferbecker2665]

This is totally helping me understand the different levers of the body. Thanks so much! :)

[@ganloque3880]

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[@expertgamer8777]

Thanks for the given knolage

[@laveenas4522]

Thanks a lot

[@MrYahya0101]

I don't think it's the heel that acts as the fulcrum, but the toes, since the heel is moving up and down, right?

[@gladysmatah]

Thanks loads

[@cris70ize14]

Thank you so much

[@keynom3632]

Can someone explain to me how the anconeus is a first class lever? I don't full understand it.

[@valerianconstantin9532]

Hello can someone tell me how I can create an animation of the human body like this?

[@muhammadtanveer2211]

best video

[@lakshmipathi-bb5fl]

Howmanytypesofcells

[@neethusethumadhavan5239]

Which site we want to search for Biomechanics notes for 1st year BPT?

[@aayushiraj6]

Same question

[@baylenjohnstone2564]

didnt they get the first lever wrong? the effort going the wrong direction??

[@manojm8362]

Isn't Elbow joint is a class 1 lever?
Correct me if I'm wrong
Because fulcrum comes in the center and effort and loads are in the two opposite ends

[@Abdul_Basit120]

I know it's been a long time since this text but anyway
Your elbow act as the fulcrum and insertion point of brachialis muscle is away from fulcrum which act as Effort and the weight can be anything in hand
Hence you first have the fulcrum then the effort and then the weight

[@comfyfern8363]

This is the way Joint Structure and Function says it too

[@safwanshahriar4108]

​@@Abdul_Basit120 I needed the explanation so thanks

[@Abdul_Basit120]

@@safwanshahriar4108 no problem

[@amrabdelhameed7694]

شكرًا

[@anokurauvone604]

Thank you, helped

[@mohammadumer8077]

Other examples of second class lever

[@buff9943]

7b salam

[@GurpreetSingh-me1yc]

Leaver in body

[@yamini-rm7uc]

Hmm

[@patq3135]

The first class lever seems incorrect. The load and effort should both be applying force downward. This example shows the the effort applying force upwards as it would be in a second and third class lever.

[@munsta08]

Muscles can only pull towards their origin. The postural neck muscles (e.g. trapezius) would pull the posterior aspect of the skull downward. On the other hand, the anterior neck muscles (e.g. sternocleidomastoid) would pull the anterior aspect of the skill downwards. Hope that helps :)

[@patq3135]

@@munsta08 Reverse muscle action is pulling from origin to insertion therefor allowing muscle pull in both directions. I was referring to the diagram of the first class lever and not the actual example of it in the body.

[@alizaiqbal4626]

Hi

[@cds6997]

Suiiiii

[@alizaiqbal4626]

Hiii

[@trickz8541]

Wack

[@tostitosfritos1748]

Why exactly is this necessary for our knowledge? Even in a profession? Who the fuck cares whats a fulcrum in the body just as long as we know what body part we're referring to it makes no sense to add the fact that the elbow is a fulcrum like wtf

[@wvhaugen]

Uh - If you are a weight lifter you have probably wondered why it is so hard to get the same gains in your calves as in your chest, biceps, etc. It is because they are a second-class lever. This is part of the evolutionary history of the human body and makes for efficiency in bipedal walking. Therefore, to get big gains in your calves you have to "blast" them to overcome the inherent efficiency.

[@stanceswitch6419]

wvhaugen as in high volume?

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[@CaptainAwesome-mz6mt]

I understand this is education... But this is seriously boring

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[@reddeadtwats8252]

Ikr