Which lever type is most common in the human body?
965444
The third class (see link for illustration).  The articulation is at one end, the resistance at the other, and the muscle is between, evidently close to the articulation.
159273
Examples of second class levers are wheelbarrows, hand trucks, wrenches, and nutcrackers. Examples of third class levers are arms, legs, cranes, catapults, tongs, and fishing poles. You asked uses, I gave examples. I hope this helps in some way. :)
482211
biceps\ntriceps\nchest or pecs\ndelts\ntraps\nlats\nabs
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they are used to convert a relatively small force into a greater one, though it's important to remember that they don't do ANY work.  one exaple is a lever and fulcrum, with which a small force can be applied to the longer end of the lever to lift a weight would provides greater resistance than the small force, without the use of the lever.  this is possible because the small force must be applied over a greater distance than the distance the weight will be lifted.
354344
femur, digital, and cerebellum
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the brain. im pretty sure its the medula obligatta that allows you to balance yourself.
1134024
very painful, you might be referring to a in Inguinal hernia....\n\nBy far the most common hernias (up to 75% of all abdominal hernias) are the so-called inguinal hernias. For a thorough understanding of inguinal hernias, much insight is needed in the anatomy of the inguinal canal. Inguinal hernias are further divided into the more common indirect inguinal hernia (2/3, depicted here), in which the inguinal canal is entered via a congenital weakness at its entrance (the internal inguinal ring), and the "direct" type (1/3), where the hernia contents push through a weak spot in the back wall of the inguinal canal. Inguinal hernias are more common in men than women while femoral hernias are more common in women.\n\nWebMd.com does not list "duodenal" as a type of hernia.
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Both fits in human body.
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Third class.\nYou move your arm in the same direction as the desired output force.
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A Type 1 Lever is where the pivot (fulcrum) is between the effort and the load. In an off-center type one lever (like a pliers), the load is larger than the effort, but is moved through a smaller distance. i.e. a hammer\nA Type 2 Lever is where the load is between the pivot (fulcrum) and the effort. i.e. a wheelbarrow\nA Type 3 Lever is where the effort is between the pivot (fulcrum) and the load. i.e. tweezers
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This would include people that used the left hand to remove defecation in olden times.  Sorry, I know this is a bit "earthy," but it's where it comes from, added to the fact that ancient people considered the left side the "evil" or gauche side of the body.
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The LEVER is a rigid bar which is free to turn about a fixed point (fulcrum). There are many types of lever. First order lever- The load and effort are on the either side of the fulcrum; Eg:- See-saw. Second order lever- The load is between the fulcrum and the effort; Eg:- Nut-cracker. Third order lever- the effort acts between the fulcrum and the load; Eg:- Knife. The PULLEY consists of a wheel with a grooved rim. The wheel is supported within a frame called a BLOCK and is free to rotate about a central axis. The pulley is commonly used for lifting loads. A single fixed pulley acts as a first order lever. (A single fixed pulley does not increase or decrease force).
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One easy way to remember, LL, left is lower. It is the way we are made so whenever we cross our legs they do not get scrunched. Also it is common that one is slightly larger than the other, the key is the word slightly. Today it is getting easier and more comfortable for us guys to simply ask these kinds of questions of a doctor. You are on the right track simply because you are aware and using appropriate terminology. Hang in there! (smile)\n\nThe average size of the tool is about 5 inches.  Every part of our body is proportionate to others.
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Generally, the force is applied at the point of "input force" - that point is determined by what class of lever you're using.\n\nFor example, if you're using scissors (First class lever), the fulcrum is at the pivot between the two handles and blades, the input force is at the handle, and the output force is on the blade.\n\nIf you're using, say, a wheelbarrow (2nd class lever), the fulcrum is at the wheel, the input is on the handle (end), and the output force is in the middle - in the bucket.\n\nFor a baseball bat (third class levers), the input force is in the middle (your hands), fulcrum at one end (you), and the output force is at the other end (the end of the bat).
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smooth organs\nstriated muscles\ncardiac heart
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Generally simple machines include levers, wheels and axles, belts and pulleys, gears, and inclined planes.   This site should help you.  Best of luck with it.
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a lever, a wheel, a pulley...