Question

Give example of each class of lever in a human body.​​​​​​

Answer 1

Answer:

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Explanation:

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.

Answer 2

Answer:

All three types are found in the body, but most levers in the human body are third class. A fist - class lever has the axis (fulcrum) located between the weight ( resistance) and the an example of first class lever as a pair of pliers or scissors. first class lever is the human body are rare

Explanation:

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